How to reinstall mac. OS Apple Support. If you dont have the App Store, cant access it, or are selling or giving away your Mac, follow these steps. Start up from mac. OS Recoverymac. OS Recovery installs different versions of mac. OS depending on the key combination you use while starting up. Turn on or restart your Mac, then immediately hold down one of these combinations Command RInstall the latest mac. OS that was installed on your Mac, without upgrading to a later version. Option Command RUpgrade to the latest mac. OS that is compatible with your Mac. Shift Option Command RRequires mac. OS Sierra 1. 0. 1. Install the mac. OS that came with your Mac, or the version closest to it that is still available. If youre selling or giving away a Mac that is using OS X El Capitan or earlier, use Command R to make sure that the installation isnt associated with your Apple ID. If you havent already updated to mac. OS Sierra 1. 0. 1. Option Command R installs the mac. OS that came with your Mac, or the version closest to it that is still available. Release the keys when you see the Apple logo or a spinning globe. When you see the mac. OS Utilities window, continue to the next section to determine whether to erase your startup disk or begin installing mac. OS. Decide whether to erase your startup disk. Decide whether to erase format your startup disk before installing mac. OS. You should erase your startup disk in the following circumstances Youre selling or giving away your Mac, so youre clearing your Mac of anything associated with you, your data, or your Apple ID. Youre trying to resolve an issue that Disk Utility cant repair. The mac. OS installer says that it cant install on your computer or volume. For example, it might say that your startup disk isnt formatted correctly, isnt using a GUID partition scheme, already contains a newer version of the operating system, or cant be used to start up your computer. If none of the circumstances above apply to you, skip to the next section to install without erasing. Erasing your disk permanently deletes all of the data stored on it. If you need to erase your startup disk, follow these steps Select Disk Utility from the utilities window of mac. OS Recovery, then click Continue. Select your device or volume in the sidebar of Disk Utility. Click the Erase button or tab. Complete these fields Click Erase to begin erasing your disk. Os X Installation ProblemsWhen done, quit Disk Utility to return to the utilities window. Youre now ready to install mac. OS. Install mac. OSFollow these steps after starting up from mac. OS Recovery Choose Reinstall mac. OS or Reinstall OS X from the utilities window. Click Continue, then follow the onscreen instructions. Youll be asked to select your disk. If you dont see it, click Show All Disks. To verify eligibility to install mac. OS, your Mac serial number is sent to Apple, and you might be asked for your Apple ID. Click Install. Your Mac restarts after installation is complete. If you erased your disk before installing, or you installed on an external drive or other new disk, your Mac restarts to a setup assistant. If youre keeping your Mac, complete the setup assistant with your own information. If youre selling or giving away your Mac, press Command Q to quit the setup assistant without completing the setup steps. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup. OS X Installation Instructions VirusScan for Mac 9. 7. McAfee VirusScan for Mac OS X Prior to installation. Cancel to stop the program and the installation. Cancel a Mac Store app update while its downloading. Cancel a Mac Store app update while its downloading. Mac OS X Hints. Learn how to install the Mac operating system on your Mac or an external drive. Choose Reinstall macOS or Reinstall OS X from the utilities window. Installing applications on Mac OS X is incredibly easy compared to most platforms. However, the approach taken can be confusing at first for many users.
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November 2017
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