Put SSD back in laptop, while booting held down option key to try to boot from USB drive. While there I also changed permissions so that everyone can read/write just to be sure. You cannot use APFS on it.įor a clean install, I format the drive as HFS+ and just leave the conversion to APFS to the installer. You just need to format the USB flash drive as macOS extended journaled. No need to do the formatting yourself, unless you really want to do it on your own. This is what I have learned after attempting to download X + 2, X + 3, with X as the current installed macOS.Īlso, even if the current file system is macOS extended journaled, you can still upgrade to High Sierra or newer since the installer will do the APFS conversion. Since you are currently on High Sierra and you want to download X + 2, then you will need a workaround like dosdude patcher or OCLP to download way newer versions. When you are running Mojave and went to the App Store, then you can download High Sierra, Mojave, and Catalina When you are running High Sierra and went to the App Store, you can only download High Sierra and Mojave while Sierra can be downloaded as a DMG file. When you are on version X, you can only download X - 1, X, and X + 1 If that doesn't work, try BS Magnet's suggestion for dosdude1's "Catalina Patcher" (which I was in the process of recommending when he posted right ahead of me). When done, you should see your login screen, just as it was on the external drive. I suggest you choose everything, and just "let 'er go". Setup assistant will present you with a list of stuff to migrate. "point the way" for setup assistant to the external drive, and give it time to digest everything. When setup assistant asks if you wish to migrate from another drive, YES, you want to do this. from the external drive you have, CONNECT IT. If you want to import user data, apps, etc. When done, you should see the initial setup screen "Choose your language". The Mac will reboot one or more times, and the screen will go dark for a minute or more with no indication of activity. I believe the installer will offer you Catalina (last OS to be supported for the 2012 MBP). When the erase is done, quit disk utility and open the OS installer. The topmost item is the internal drive - can you see it? Go to the VIEW menu and choose "show all devices" (it's VERY IMPORTANT that you do this, otherwise you won't see the internal drive) The internet utilities take a while to load, be patient. This should get you booted into INTERNET recovery.Ħ. After a while, you'll be prompted for your wifi password - let go of the other keys now and enter it.ĥ. Press and hold "command- OPTION-R" (keep holding down), and press the power on buttonĤ. Print out this reply and keep it for reference as you proceed.ģ.
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