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How do I reinstall macOS High Sierra?
Hold down Option-Command-R as you turn on or restart your Mac. Release the keys when a spinning globe appears. This will boot the latest version of Recovery Mode over the Internet, which will offer to install macOS High Sierra.
Will reinstalling macOS make it faster?
When Your Mac Is Really Slow You might need to remove some startup programs, run updates on your system, or clean out your storage drive to fix this issue. But if none of these fixes have an effect, reinstalling macOS can likely help speed up your system.
How long should reinstalling macOS take?
Depends on what kind of Mac you have and method of install. Typically, if you have a stock 5400 rpm drive, it takes about 30 – 45 minutes using a USB installer. If you are using the internet recovery route, it can take over an hour, depending on speed of internet etc.
How do I reinstall High Sierra?
How to Reinstall macOS Sierra / macOS High Sierra. You can reinstall macOS Sierra or macOS High Sierra by doing the following: Back up the Mac before beginning. Reboot the Mac and hold down COMMAND + R keys concurrently right after you hear the boot sound, this will boot the Mac into Recovery Mode.
How do you unlock a Mac disk?
1. Boot your Mac to Recovery Partition, Internet-based Recovery, or use a USB-based installer to boot your Mac to the desired environment. 2. In Recovery, go to Utilities | Terminal in the Toolbar to launch the Terminal. 3. Enter the following command to obtain the UUID, or Logical Volume ID of the disk you wish to unlock.
How do you install high Sierra?
How to install macOS High Sierra Launch the App Store app, located in your Applications folder. Look for macOS High Sierra in the App Store. Here is a link. This should bring you to the High Sierra section of the App Store, and you can read Apple’s description of the new OS there. When you’re ready, click the Download button at the upper left.