Select Reinstall OS X from the Utility Menu and click on the Install button. Quit Disk Utility and return to the Utility Menu. Set the Format type to Mac OS Extended (Journaled.) Click on the Partition button and wait for the process to finish.

Scan down the list of apps you’ve purchased or download for free (which is in order of when you downloaded them) and find the old version of macOS. Click on the Options button, set the partition scheme to GUID then click on the OK button. Type everything else exactly as you see it (or better yet, copy and paste it from here). For information about the Users & Groups and Parental Controls. MacBook Air doesn’t show a disk to select when trying to reinstall OS X MacBook Air doesn’t show a disk when asked to select when trying to install OS X Yosemite. (The name of the version of macOS, is the one you want to install on the key and downloaded.) Instead of '/Volumes/ MyVolume', type the name of your USB drive. Mac, updating software, choosing a startup disk, and many more system-wide options. Make sure you’re logged into the Mac App Store with the Apple ID you used to update to Sierra (or whichever version you want to clean install), then click Purchased in the menu bar along the top. In Terminal, type one of the following commands, depending on your version of macOS. If you’re using Sierra or earlier, we can use the same method as above, but it’s a bit harder to get the install file: Apple doesn’t offer downloads of outdated OS versions through the normal store front, and searching for ‘Sierra’ won’t find what you’re looking for. Once installation of High Sierra is complete, you can restoring apps and settings from a Time Machine backup, or download them again manually.

Go back to the main menu and choose Install OS X. Select ‘Disk Utility’ and your hard drive, then click Erase. Choose to install macOS High Sierra from the drive. With the boot drive connected, start up – or restart – your Mac while holding down the Then create two partitions with one as Mac OS Extended (Journaled) for OS X installation, (any size, OS X needs at least 8GB) the second one as free space, choose apply, close disk utility and install Be aware OS X UEFI install goes in 2 installation steps, first it prepares the hdd, then it will reboot.

Os x mavericks select disk