unix:apple_osx:reinstall
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unix:apple_osx:reinstall [2020/10/12 01:10] – rodolico | unix:apple_osx:reinstall [2020/10/29 01:05] – rodolico | ||
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====== Reinstall OS X ====== | ====== Reinstall OS X ====== | ||
+ | |||
+ | ===== The Problem ===== | ||
Recently (Fall 2020) I was able to purchase an old MacBook Air for my daughter to use. It is an older device, but working just fine for what she wanted. The original owner had not removed his account, and I had no admin password, so I decided to just do a reinstall. Very bad move on my part. | Recently (Fall 2020) I was able to purchase an old MacBook Air for my daughter to use. It is an older device, but working just fine for what she wanted. The original owner had not removed his account, and I had no admin password, so I decided to just do a reinstall. Very bad move on my part. | ||
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Rebooted the system, pressed Apple-R to go into recovery mode, and told the system to reinstall itself. After formatting the drive and starting the install, I get a timer stating it is going to take -2, | Rebooted the system, pressed Apple-R to go into recovery mode, and told the system to reinstall itself. After formatting the drive and starting the install, I get a timer stating it is going to take -2, | ||
- | Finally got it installed. I had a friend who had a full system backup who was able to take that image and copy it to the MacBook, and it worked just fine. Then, my daughter tried to install some software which corrupted the machine, so she brought it back to me to repair. | + | ===== The First Solution ===== |
+ | |||
+ | Finally got it installed. I had a friend who had a full system backup who was able to take that image and copy it to the MacBook, and it worked just fine. | ||
+ | |||
+ | ===== Second Problem ===== | ||
+ | |||
+ | Then, my daughter tried to install some software which corrupted the machine, so she brought it back to me to repair. | ||
+ | |||
+ | Not being an total idiot, I had made a full TimeMachine backup before I gave the machine to my daughter, so I thought "no problem, I'll just recover from TimeMachine" | ||
+ | |||
+ | Finally, found [[http:// | ||
+ | <code bash> | ||
+ | hdid -nomount "/ | ||
+ | diskutil list | less | ||
+ | dd if=/ | ||
+ | </ | ||
+ | |||
+ | The first command needs to be modified to mount your dmg. This mounts the dmg so you can actually see it. Well, doesn' | ||
+ | |||
+ | When you run //diskutil list | less//, it will show you all the " | ||
+ | |||
+ | Now, based on the information you got from there, run your dd command. ' | ||
+ | |||
+ | I got a bootable system out of it, but when I tried to reboot, it wanted to finish installing the OS, and would not do it on the internal hard disk. But, I was able to install it to the external (that had the dmg on it). It reformatted that disk and is now booting on it correctly. | ||
+ | |||
+ | 5 days after the attempt to reinstall, that is where I stand. More later. | ||
+ | |||
+ | ===== The final Solution ===== | ||
- | Not being an total idiot, I made a full TimeMachine backup before I gave the machine to my daughter, so I thought "no problem, I'll just recover from TimeMachine" | ||
===== Links ===== | ===== Links ===== | ||
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* Restore OS from Time Machine backup [[https:// | * Restore OS from Time Machine backup [[https:// | ||
* Mac Startup Key Combinations [[https:// | * Mac Startup Key Combinations [[https:// | ||
+ | * Mojave Installer Image [[https:// | ||
+ | * Creating a bootable USB [[https:// | ||
+ |
unix/apple_osx/reinstall.txt · Last modified: 2020/10/29 01:35 by rodolico