![]() ![]() ![]() Select Disk Utility from the utilities window and click Continue. ![]() So I quit Startup Disk and went back to Disk Utility, and I tried running First Aid on both Macintosh HD and OS X Base System. If you can’t boot in macOS to perform hard disk repair using any of the 10 tools listed above, you need to restart your computer in macOS Recovery and repair the hard disk using Disk Utility: Turn on your Mac and press and hold Command-R. Startup Disk could not gather enough information on the selected disk. You can’t change the startup disk to the selected disk. Clicking restart, as one might expect, yields the following error message: Then to get out of Single-User mode just type the word: reboot. So I thought I’d try quitting OS X Utilities without reinstalling OS X and see what happens.Īfter clicking on Choose Startup Disk, I get a blank list to choose from, with a restart button. Boot into Single-UserMode and perform fsck -fy and keep running it until it says ' The volume (nameofvolume) appears to be OK'. But when I hit continue, it gives me an error message:Īn error occurred while preparing the installation. I restarted with cmd R to load OSX Utilities, and I used Disk Utility to wipe Macintosh HD, overwriting it three times and formatted as OS X Extended (Journaled).Īfterwards, after successfully connecting to my Wi-Fi, I clicked on Reinstall OS X, and it’s giving me the option to set up El Capitan (the OS X that’s installed, and from what I can tell, the latest that can be installed). I’m helping someone with their old laptop (17”, mid-2009, if that matters). You can hold down the C key on your keyboard to instantly boot to a Mac OS X or other bootable disc in your Mac. ![]()
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