AFAIK, there is no way to clear a serial intentionally or by accident. The only way to get a blank system serial number is when the logic board is replaced. Replacement MLB only comes with a part serial number but it does not have a system serial number. I assume that you took your laptop to have it repaired?
When a new logic board is replaced by Apple or ...
I bought an iMac from a colleague - he wiped it completely and it was in the power up install process choose language.
Then as I continued the normal install it stopped as it thought it was stolen...
The serial number is checked against Apple ID’s and as it was still listed against my colleagues Apple ID it refused to continue...
Once my colleague removed ...
MacOS protects system level files as well as kext files. Maybe the following will help you. Please backup everything up and research it a little further before attempting making any of these changes.
To disable System Integrity Protection:
Boot into recovery mode and enter the following terminal command
Changing Kext Files
To allow ...
I'd try with a script using the following outline
sudo nvram -c
which should clear the contents of NVRAM.
curl 'https://sourceforge.net/projects/refind/files/0.11.4/refind-flashdrive-0.11.4.zip/download' --output refind.usbimage
copy SmcFlasher there (https://discussions.apple.com/thread/4855319?answerId=22024754022#22024754022)
shutdown -r now
As you stated in your post, this is a feature of various 2016 (and later) MacBook models, it is not supported on your 2013 MacBook Air.
I suppose you could get into the habit of putting your MBA to sleep instead of shutting it down, as this would mean it'd start fairly quickly upon opening the lid, but of course that's not the same as auto boot.
It all looks pretty normal, as far as I can tell. Yours looks not dissimilar to mine. The data is encoding in base64, and decoded gives things like:
Check if your charger might be dying.
I recently had to change the charger of an old MacBook, after experiencing very similar issues and eliminating all sorts of other possible problems. I even bought a new battery (yes, it was that old). I was about to give up on the device, thinking the motherboard was dead or something.
As a last resort I went to a ...
Doesn't appear to be a direct way to do this. Part of the problem is that your changes to the NVRAM, if you were to clear it (nvram -c), will not take effect until after a reboot.
You could try this method which will perform a side-by-side diff of the contents of NVRAM prior to running a nvram -c.
$ sdiff <(nvram -xp) <(nvram -c &&...
Sounds like a SIP restriction rather than a keyboard issue. Read through the linked article to get an idea of what SIP is, and then try this:
Ensure you have an up-to-date backup, in case of emergency.
Power off your Map as normal.
Hold down Cmd-R and press the Power button. Windows keyboard should be Win-R instead. Keep holding the keys down until the ...
Why not put a small and not super powerful magnet on the specific area of the sleep wake sensor so that the system thinks the lid is shut?
With power and keyboard connected, you'll have it running in closed-clamshell mode with full benefits for your use case and no need to move the actual display.
There are amazing ...
You can achieve what you want with the system call mmap(2) passing as argument for the protection value PROT_NONE which means pages can't be accessed.
But I would suggest to buy a new memory chip, because the error you detected is the signature of bad quality and your erroneous bit won't stay alone for too long (within the same chip).