Chosen Solution
So I’ve left my SSD in my MacBook Air and I’m pretty sure it tried to start using the drive! I’ve tried all the reset videos on YouTube but none have worked I’ve let it charge and when it was fully charged I turned it on and I was able to access the login screen, but when I typed in my password it’s glitched and turned off forever. It’s currently in Cairns AUS for repairs. Hoping other people can help me who have experienced the same problem.
So, typically it’s not meant to reset using an external hard drive, but what typically happens is that it updates during the day, and may have saved a critical file to you external HD! So, when you tried to turn it back on it went and said “screw you!” That’s ok, you can simply hard re-set the device, and to do this effectively you need to let it power down to about 5% battery. Then you need to hard reset, first try Command ‘R’ and it should take you to a OS reboot screen, if that fails Option-Command-P-R. Now realize that if you let this occur it will wipe your drive clean. So if you want you can Command-Shift-Power to hard shut down, and sometimes this works. Turn it back on, let the battery drain completely, and plug in and try again. Hard reset again and you should have resolution. Otherwise, unscrew the door (the bottom of the computer) and disconnect the battery first, restart and if that fails disconnect the SSD. This should be your last resort as it is a software issue and will need a soft ware solution. It is actually very common.
