You can always start a backup with Time Machine before if you need to. This guide is simply going to cover how to start a reinstallation of OS X with Recovery mode, and not the other options available when booted into recovery. ReInstall OS X on a Mac Using Internet Recovery #Alternate osx cardminder how to# Internet Recovery requires internet access, that may be slightly obvious but it’s worth mentioning because if the Mac is unable to connect to a network then it will not be able to download the operating system. Whenever possible, you should back up the Mac with Time Machine before attempting this. Select the destination and complete the re-installation (or installation) of OS X as usual.When finished downloading, you’ll see the familiar “OS X Utilities” screen, choose “Reinstall OS X” to begin the re-installation process of the Mac operating system.When you see a spinning globe icon, Internet Recovery mode has been entered with a message saying it can take a while, a progress bar appears as the recovery functions are downloaded.OPTIONAL: You may or may not see an option to join a wi-fi network, this depends on whether the Mac can access any saved networks from OS X or not.Immediately after hearing the Mac boot chime, hold down Command+Option+R – if you see the Apple logo you waited too long and need to reboot and try again*.This process will be the same on any new Mac, be it an iMac, MacBook Pro, MacBook Air, etc: You can start the internet recovery reinstall process from either a shutdown Mac, or by rebooting the Mac. You’ll notice the version of OS X that can be reinstalled this way is shown in the icon or listed under the “Reinstall OS X” option, and that version will match whatever version of OS X came preinstalled on the Mac. For example, if the Mac shipped with OS X Mavericks but is now running OS X Yosemite, then OS X Mavericks would be the version that reinstalls through the Internet Recovery reinstall process.įor Macs that do not currently have an operating system found or installed, the option will show as “Install OS X” rather than “Reinstall OS X”. Installing and re-installing OS X through Internet Recovery is pretty easy, but do be aware that because everything is coming from Apple servers, it can take quite a while as the system restore features are downloaded locally, and then the version of OS X to install are also downloaded locally as well. When OS X has finished installing on the Mac, it will boot into a fresh install of OS X system software.ĭo note that if you are reinstalling OS X to try and repair some greatly messed up operating system install, you’d likely be better off performing a true clean install of the system software by formatting the drive and then installing OS X onto it (or another drive). If interested in going that route, you can learn about clean installing OS X Yosemite, or clean installing OS X Mavericks, both of which are best performed from a separate boot drive or bootable USB installer. * You can also use Command+R to boot into Recovery mode, older Mac models that do not support Internet Recovery will need to do that.
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