I’m using a 2012 MacBook Air and was trying to update Mac OS X Lion to El Capitan but it an error popped up and said that some files are missing and said to restart the device after restarting it I tried to log in but when I do it goes into kernel panic over and over again and way to fix this?
MacBook Air
Try booting Safe mode
http://support.apple.com/kb/ht1564
If that does not work, then boot into the Recovery partition, or Internet Recover, where you get the Recovery mode code over the Internet directly from Apple
https://support.apple.com/en-us/HT204904
Boot Command-R
or Command-Option-R
or Command-Shift-Option-R
It is explained in the body of the webpage.
Try booting Safe mode
http://support.apple.com/kb/ht1564
If that does not work, then boot into the Recovery partition, or Internet Recover, where you get the Recovery mode code over the Internet directly from Apple
https://support.apple.com/en-us/HT204904
Boot Command-R
or Command-Option-R
or Command-Shift-Option-R
It is explained in the body of the webpage.
Kernel panic loop after trying to go to El Capitan from Lion
