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1. #Macos disk utility how to
2. #Macos disk utility install
3. #Macos disk utility mac

The Apple Store support is not really worth it as my 2010 iMac is probably too old to be sold for more than the support costs.

#Macos disk utility how to

I don’t know how to proceed at this point.

#Macos disk utility mac

I have tried several Mac startup key combinations, but all boot up to macOS utilities. After that it always booted up to macOS utilities, where I repeatedly got OS X Base System is locked when I tried to reinstall High Sierra.

#Macos disk utility install

I erased the OS X Base System, thinking I could use my install disc to reinstall the original Lion OS. I forgot that the iMac had an ethernet port on the back, & that’s where I think things went wrong. Everything went fine until I got to the screen which read: No connection to the internet. I was intending to sell this iMac after wiping it & then reinstalling the OS. My system: iMac 27”, mid 2010, last macOS- High Sierra, 10.13.6 Alternatively, open a Finder window, click Applications in the sidebar, double-click the Utilities folder, and then double-click Disk Utility. I I am having similar problems as many others, but I don’t see or understand fully the various solutions offered on the forum as applicable to my situation. To access the Disk Utility in macOS, just press Command+Space to open Spotlight search, type Disk Utility into the search box, and then press Enter. Locked macOS, can't reinstall High Sierra can not reinstall operating system because of locked disk Pic 3 - Cannot reinstall High Sierra as the only disk available is OS X Base System, that is locked Pic 2 - When I press the + sign nothing happens Pic 1 - OS X Base System is the only disk available Does anyone know how to fix this? Thanks! Most of them where able to either erase or re-install the system, but I'm at a dead end, as I don't have any of these options available.

I've researched on the internet and a lot of people made this mistake. Boot the Mac as usual and relaunch Disk Utility to verify the disk. Boot the Mac as usual, verify the disk again in Disk Utility, and partition as usual. When fsck is complete, type exit or reboot to reboot. At the command prompt, type: /sbin/fsck -fy. This disk is also locked, so I cannot re-install High Sierra (see picture 3).Īs the OS X Base System is the only thing left in the computer, every time I start it up, it does directly into the Recovery menu. Reboot the Mac into Single User Mode by holding Command+S during boot. In the Disk Utility, the options for erase, restore and unmount are all unavailable (see picture 2), I imagine that's because you normally cannot do any of these on the OS X Base System disk. This new disk image cannot be partitioned: when I hit the + sign in the partition screen, nothing happens. Hi! I had problems with my iMac and tried to erase the OS and re-install, but I did something wrong and now all I have is asingle partition with OS X Base System that is the size of my HD (1 TB), see picture 1.