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MacBook Pro – AMD GPU issues – how I finally fixed it… WOOOOOHOOOOOO!!!!!!

MacBook Pro – AMD GPU issues – how I finally fixed it… WOOOOOHOOOOOO!!!!!!

So, after several weeks, I finally found a way of fixing it. A few days OK I was ready to give up. But then I found that with the operating system the Mac was using I had to do things differently. The operating system in question, High Sierra.

How did I do it, good question, here is the answer…

First of all, I needed to get a copy of Arch Linux. I downloaded it and stuck it on a USB stick.

Before we go into Arch Linux, I did some preparation on the MacBook pro. At this point the graphics on the Mac was bad, you could barely make out what was going on. Boot in single user mode by holding down command and S.

Once in single user mode, run the command:

sudo nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00

Then run:


When rebooting hold down command R down until you hear the chime.

You will then be able to select which drive you want to boot from. Insert the USB stick with Arch Linux on into the machine. Select the EFI boot. Select Arch Linux archiso x86_64 UEFI CD. Press the E key. At the bottom of the screen you will get a line of code. At the end at nomodeset

MacBook pro – Arch Linux

Run the command:

cd /sys/firmware/efi/efivars



You will get:

MacBook pro – Arch Linux list

At the bottom right hand corner you can gpu-power-prefs-

We need to remove it do this use the command

rm gpu-power-prefs-

Then hit the tab key, this should automatically populate the rest of the filename. I did have a few issues where it didn’t populate the full name so had to type in the last section.

If you don’t have one of these, don’t worry, go to the next section.

Sometimes when removing you may get an error that says

“operation not permitted”

If that’s the case, then the efivarfs has been mounted as read only. You will need to remount it with read write permissions and repeat the rm command. To do this run the command:

cd /
umount /sys/firmware/efi/efivars/
mount -t efivarfs rw /sys/firmware/efi/efivars/
cd /sys/firmware/efi/efivars/
rm gpu-power-prefs-

Again, after the gpu-power-prefs- hit the tab key which should populate the rest of the filename.

Now we have to create a new gpu-power-prefs file, run the command:

printf “\x07\x00\x00\x00\x01\x00\x00\x00” > /sys/firmware/efi/efivars/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9

Finally on this bit (in theory), we can set it so the file can only be accessed by a superuser. You can do this running the chattr command, this is:

chattr +i “/sys/firmware/efi/efivars/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9”

If this works, unmount the efivars using the command:

cd /
umount /sys/firmware/efi/efivars/

This basically flushed the efivars out. Now to reboot.


For some reason chattr wasn’t found. So I went to basics and changed the owner of the file /sys/firmware/efi/efivars/gpu-power-prefs-fa4ce28d-b62f-4c99-9cc3-6815686e30f9 using chown.

But for some reason, the chown didn’t work, I couldn’t even figure out what the user permission was.

But it still didn’t work. I rebooted the machine, still got stuck half way through.

So I forced shut it down.

If you have done this already, boot into single user mode but holding down command and S when you boot the machine up.


nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00

And reboot. On the reboot, hold down command and R when you boot the machine up, let go when you get the Apple logo.

macBook pro – macOS utilities

Click on utilities and terminal:

MacBook pro – macOS utilities

If you have more than one partition run the following lines, if you only have one partition you can skip this bit:

diskutil cs list (find UUID for drive)

diskutil coreStorage unlockVolume UUID

Now, we all need to do the following, run the command:

cd /Volumes/Macintosh\ HD

MacBook pro – terminal change the the directory

Now, we need to remove the AMD Kexts, first create a directory where we can stick them on the off chance you need them in the future using the line:

mkdir AMD_Kexts

Because I had done this a few times, I have now started to create the directory on the date, so this one I called 13Dec19_AMD_KEXTS

Now, lets move those AMD Kexts:

mv System/Library/Extensions/AMD*.* AMD_Kexts/

then type in reboot:


In theory, if you have done everything correctly, you should now have a working MacBook Pro.

I booted, and f**k me, it worked!

MacBook Pro – finally, it is working!

But the question is, will it reboot OK.

But I still want to want to set that files so it is only accessible to the superuser (technical term – immutable). I have decided not pursue this, it’s December, I need to get this Mac back to her owner before Christmas and fast running out of time.

After looking online, sometimes if the USB stick that you use isn’t formatted correctly that seems to be an issue. So will give that ago if it comes back to me.

Still can’t get this Mac to boot!!!!!!!

Still can’t get this Mac to boot!!!!!!!

Already I have discussed how to get this Mac working on Arrrggggggghhhhh, my Mac won’t boot, into anything and Install a new hard drive in a Mac. I was fast running out of options.

After sleeping on it, thought I would go back to basics. There is something that is conflicting, but what.

I stuck the time machine in again, held down the Alt/Option key and booted into macOS utilities

MacBok Pro -macOS Utilities

Click on utilities, then terminal:

MacBook Pro – macOS Utilities Terminal

You will get:

MacBook Pro – Terminal

Most of what I am going to do is over at MacBook Pro GPU AMD failure method 3, although this Mac isn’t encrypted, if yours is, there is some other stuff to do some extra stuff with this time as the hard drive was encrypted.

To unlock, replace the line

diskutil coreStorage unlockVolume UUID


diskutil corestorage unlockVolume UUID -stdinpassphrase

The -stdinpassphrase will prompt you for a password in the command line.

This still didn’t fix it though.

I have already run a diagnostic check, but nothing came up with that. So I am going to do it again but using the internet hardware test. To get into this hold down option/alt and D, you will get this:

Apple Internet Diagnostics

Select your language and the arrow button. You will get:

Apple Internet Diagnostics

Do an extended test:

Apple Internet Diagnostics

It did’t come back with anything.

Lets go back even more to basics, I reset the NVRAM and SMC

To reset the NVRAM, hold down Alt/Option, P and M down, wait until you hear three chimes. To be on the safe side I did it for six chimes, may as well make sure.

Still nothing. Reset the SMC, I thought I needed to press shift, command and alt/option. But I had misread it, it was actually shift, control and alt/option.

Does it boot into safe boot? No. This is very peculiar.

I can only think of one more thing. Otherwise, I am going have to admit defeat.

To be continued…

Install a new hard drive in a Mac

Install a new hard drive in a Mac

So, after some heart ache over at ARRRGGGGGGGHHHHH, my Mac won’t boot into anything! I thought the only thing left was to try another hard drive.

This is for High Sierra, I can’t guarantee that it will work for you. By doing this all your files will be deleted. If you can try and take a back up first.

I took the hard drive that was in the Mac out, I had just literally bought a new external hard drive that I am going to be using for back up purposes. The original hard drive in the Mac was a 500GB drive. The hard drive I am going to use for this check is a WD 2TB hard drive.

First of all, the hard drive I had came with an NTFS partition. We need to make this so it is accessible on the Mac. Two ways of doing this, all depends on what macOS you are using.

Normally, the ideal way of dealing with this is to use installation media, you can download a copy on the App Store, but if you don’t have that, don’t worry, I am going to use Internet recovery, hold down Command, alt/option and R when booting, when you hear the chime release.

For some reason, I couldn’t do this on the Mac that isn’t working, so I had to plug it into my personal machine. Open disk utility and select the drive.

Disk utilities – MacBook Pro

Click on erase. Give the drive a name, the format is Mac OS Extended (Journaled) and scheme is GUID partition map.

Erase – Mackbook Pro

Click on erase.

I still couldn’t get the thing to install. I was getting the error:

you may not install to this volume because the computer is missing a firmware partition

This is what it looked like:

MacBook – Firmware issue

So I went back to the macOS utilities and decided to try and install it using the time machine.

macOS utilities

Select the time machine:

Restore Time Machine

Then the backup:

Time Machine Restore Point

Select the target drive, in this case Paddy:

Time Machine – Target Drive

The restore process will start

Time Machine – restore

After 6 hours, I tried to boot, nothing.

Hmmm, I put the original drive back in, initially it wouldn’t boot. So I thought I would try something different. I held down the alt/option button down and selected the Macintosh HD, this time I got this.

A surprise development with with the original hard drive.

I selected United Kingdom as the location.

Then the keyboard layout:

Select Keyboard

Select my network and stick the password in.

I now get:

macOS installation

For now, I’m not going to transfer any information.

Sign in with your Apple ID:

iCloud login

You’ll be logged in, for now, I’m not going to enable two factor authentication. Click continue:

Two factor authentication one

I decided not to upgrade to two factor authentication.

Two factor authentication two

Agree to the terms and conditions.

Install T&Cs

Now we need create an account, this case admin

Install T&Cs agree

The account will be created and iCloud will be set up.

Create account

I don’t want to set up the keychain yet

iCloud keychain

When you get to express set up, continue.

Install, Express set up

I don’t want the files on the Mac in the iCloud, continue

Disk encryption

I don’t want to set encryption up yet, continue. The Mac will now set up.

Eventually it will reboot. But it won’t boot, still. So I forced reboot holding the alt/option button down and select the hard drive.

It still gets stuck on the Apple screen and shuts down.

To be continued….

Arrrggggggghhhhh, my Mac won’t boot, into anything

Arrrggggggghhhhh, my Mac won’t boot, into anything

Well, a bit of a fib, it’s not my Mac, it’s someone else’s. He’s had several issues with the same machine over the last year or so, mainly with GPU AMD failure.

So, what did I do to fix it? It was a long winded process. Initially I thought the hard drive or the motherboard had failed. Basically when I booted the machine up it just went to a white screen.

WARNING – these worked for me, they may not work for you. The only way this will work fully, your Time Machine is needed. The author of will not be held liable for loss of data or broken machines. Do not perform these tasks if you are a novice.

Initially, the GPU AMD had failed again, so I followed the instructions on GPU AMD failure – method 1. The machine wouldn’t boot into Verbose, safe or recovery mode. I had a few issues with the single user mode, but finally managed to get in. It didn’t look normal, but it did the job. In this instance when I typed in:

nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00

When I got to the = part, it decided to process the command that I hadn’t finished writing yet. I hit enter and I was able to write the full command in without issue.

I was then able to turn verbose on.

Type in reboot. This time I was able to get the Apple symbol:

MacBook Pro with Apple symbol

But it failed, it just shut down.

I thought is it a hardware issue. I went into diagnostic mode and did a full test. To get into diagnostic mode when you turn the machine on hold down the D key. When running the diagnostic it will look something like this:

MacBook Pro, diagnostic screen

As you can see with this, the screen is not entirely clear, that was due to teh GPU AMD failure, again.

So, what other options did I have? It just wouldn’t boot.

I decided to hold down the Alt/Option key on the keyboard when booting. This allows me to select the volume I want to boot into:

MacBook Pro – volume selector

I selected the hard drive and got the error:

MacBook Pro – error with update

Although this may not look good, it is fantastic news. It actually tells you what the issue is. This shows the update of the Mac was corrupt.

Two ways to resolve this, if you search for MacOS update download, you can find the official Apple image. You need the combo update.

If you download it on an Linux or Windows machine you will need to convert the image to an ISO. You can do this using dmg2img. You can then burn the image to either a USB or DVD.

In theory, you should be able reinstall the MacOS update from the disk. But for some bizarre reason when I went to the select volume screen it didn’t show the USB drive. When I put a DVD into the drive it kept getting spit out.

I was running out of ideas. What else could I try?

I plugged the time machine into the machine. I went into the select volume, voila, I could see the time machine:

MacBook Pro – volume selection – time machine

I selected the time machine, eventually I got:

MacBook Pro – time machine

In my case, I selected English, then continue. I then got this familiar screen:

MacBook Pro – macOS utilities

I could do several things here, if needed I could install a new version of the MacOS, but I wanted to restore it. So I selected the Restore from Time Machine Backup, next I got:

MacBook Pro – Restore from Time Machine

Click on continue. I got:

MacBook Pro – Select a Restore Source

Select the back up source, in this instance, Back up.

Click on continue and select the time machine back up you want to restore the machine to:

Click on continue, then select the destination:

MacBook Pro – time machine – Select a Destination

Finally, click on restore.

The time machine will restore the machine:

MacBook Pro – Restoring

It will start to erase and prepare to restore from the time machine.

MacBook Pro – Erase and Prepare

Once it has done all that, it will start to restore. With this restoration, it took close to four hours, this is what it will look like:

MacBook Pro – Restoring

Eventually, the restore will come to an end:

MacBook Pro – Finishing restore

The machine will automatically reboot. But, it still wouldn’t boot. It just shut down again.

I decided to try and boot into Safe Mode, to boot into Safe Mode, hold down the shift key when you first turn it on until you hear the chime. It booted.

MacBook Pro – after restore in safe mode.

I decided to boot the machine into normal mode. It still failed to boot correctly. So back into Safe Mode.

I tried to reset the NVRAM, you do this my holding down the Command, Option/Alt key and P and R simultaneously. Release when you hear the chime.

In this case, still no look. The next thing to try is to reset the SMC.

To reset the SMC, hold down Shift, Option/Alt, Command and the Power button simultaneously, make sure that your power supply is plugged in.

In this case, it still didn’t fix the thing. It just went to white then rebooted.

I have to say, now, I am really scratching my head. What’s wrong?

I tried to back into safe mode, no luck. I had to go back to the start and set the power preferences for the AMD GPU.

Tried to reboot in normal mode. I just get the Apple logo.

MacBook Pro stuck on Apple screen

I tried again to get into safe mode, this time it worked.

With this machine I had created an admin account the last time I did some work on it. I logged in, opened disk utility.

Clicked on first aid, then continue.

Reboot to see if it’s work……. no, still no good. I thought I would even try and to a full reset on NVRAM, to do this you hold down Command, Option/Alt key and P and R simultaneously and wait until you have heard three chimes. But this still didn’t fix the damn thing!

This is getting serious. What else could it be? I thought what the hell, why not go back to basics, don’t restore the machine, do a complete reinstallation of the macOS. Plug in your time machine, hold the alt key and select the time machine volume as explained above. When you see this select reinstall macOS.

So it went through the install process, reboot, and it booted into normal more, woohooo….. but the trackpad wasn’t working correctly.

Basically, when you move the mouse it’s fine. But when you try and click, nothing. To resolve this minor issue I went into settings then accessibility, disabled the mouse then enabled it again. It worked.

Reboot to make sure everything is working, it won’t boot again, arrrggghhhhh.

There must be something that is conflicting with the boot. But what?

First thing I checked, is the hard drive connected correctly? Checked that tried to boot, no nothing. I found some software called EtreCheck.

EtreCheck MacBook Pro

But nothing obvious when I get the report.

This is getting serious. My next thought is to format the hard drive and do a clean install. Plug in the time machine disk. When you start the machine hold down the command button until you hear the chime. Once booted head over to disk utility, erase Macintosh HD.

MacBook Pro – disk utility

Once done, close the disk utility and start the reinstall:

macOS utilities – MacBook Pro

You will get:

MacBook Pro – first install screen.

Go through the install process. In this instance I chose to migrate the information from the time machine.

After a few hours it was ready. Let’s boot. I won’t swear on here, but a few choice words came to mind, it still didn’t fscking boot!!!! But it did boot into safe mode.

To be continued…

Head over to install macOS on a new hard drive.

Change directory and folder permissions on mass

Change directory and folder permissions on mass

Recently, I was doing some work on the on a MediaWiki installation. For some reason I had all the permissions set up wrong.

Obviously, MediaWiki has thousands of files to change.

So first of all, in the shell, I ran the command from public_html directory:

find -xtype f |xargs chmod 644

That changed the the files. I then ran the following command from the public_html director:

find -xtype d | xargs   chmod 755

MacBook Pro GPU AMD Failure Method 3

MacBook Pro GPU AMD Failure Method 3

Who said Macs just work? So this is the third time a friends Mac has failed, and again, it is the GPU AMD. This time it wouldn’t boot, and it wouldn’t boot into recovery or disk selection. So what I had to do was a mix of method one and two.

WARNING – these worked for me, they may not work for you, ensure you take a full back up before performing any of these tasks, the read only disk image will be faster, but the read-write is better, it still took me two days to perform a backup for a 500GB disk. If your Time Machine is available, use that. The author of will not be held liable for loss of data or broken machines. Do not perform these tasks if you are a novice.

So first, I went into single user mode and followed the instructions over here.

I rebooted, but I still couldn’t get it to boot, it just got so far and then rebooted. I tried to start ArchLinux as detailed in method 2, but no go. So I decided to go into recovery mode.

Go to Utilities and open terminal and performed the second part of method 2.

Once in recovery mode I opened the terminal:

If you have more than one partition run the following lines, if you only have one partition you can skip this bit:

diskutil cs list (find UUID for drive)

diskutil coreStorage unlockVolume UUID

The UUID is the logical volume.

Now, we all need to do the following, run the command:

cd /Volumes/Macintosh\ HD

Now, we need to remove the AMD Kexts, first create a directory where we can stick them on the off chance you need them in the future using the line:

mkdir AMD_Kexts_BU

Now, lets move those AMD Kexts:

mv System/Library/Extensions/AMD*.* AMD_Kexts_BU/

then type in reboot:


In theory, if you have done everything correctly, you should now have a working MacBook Pro.

BUT, please have in mind, this is not a permanent fix. When you upgrade or if you need to reset the SMC or NVRAM you will get the same error and you will need to perform the tasks above again.

Resetting Windows 10 to factory reset.

Resetting Windows 10 to factory reset.

So, my Dad got a second hand laptop, it was Windows 10 one. It was an Acer one.

The previous owner hadn’t reset the machine, so I was given the job of sorting it out for him.

So the first thing I needed to do was to get into the restore screen, when booting up on the Acer screen I pressed Alt and F10. This sent me to the restore.

I was given the option of doing a complete restore or a restore, but keeping the files and software. I opted for a complete restore. This took a few hours so I left it overnight.

Finally I was able to install Windows 10 as if it was a brand new computer. My final task is more cosmetic, but the machine is filthy, so will give it a good physical clean.

Customizing Cheeky Radio Pro

Customizing Cheeky Radio Pro

So, you have downloaded Cheeky Radio Pro, you have tested it and it works. Now it’s time to customize the App for your needs.

Thankfully, most of the hard work has been taken care of, you just need get your stream(s), change the images and the links to your station App for news and your website.

First of all, you may need to download the Apple design resources. I am using GIMP, hence I needed to download the PSD files.

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