Mac OS partion not showing up

Hello I installed windows after installation of other OS I’ve tried it doesn’t show up anymore. Thanks.

iMac 27", macOS 10.14

Posted on Jun 25, 2019 2:57 PM

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Posted on Jun 25, 2019 3:03 PM

If you're only able to get to Windows, and if nothing is actually broken you can switch back to macOS normally in one of two ways:


  • Bring up the Boot Camp Support in your Windows system tray (near the clock) to see if you can select to startup with your Mac there.
  • Shut down the power and when you turn it back on hold down the OPTION key and see if your Macintosh HD shows up as an option.


Let me know if this is not the case.

55 replies

Jul 3, 2019 12:32 PM in response to WatchDominionDotCom

Latest public macOS is Mojave (10.14.x). Sierra is 10.12.x.


Do you have a backup of macOS? If yes, erase the internal disk and restore from backup.


If you want to play around with different OSes, I suggest you install a stable macOS release on an external disk, from which you can boot, if you have a similar situation in the future. If you are in this situation again, erasing/re-installing a stable version or booting from an external stable version is the best solution.


Keep your wired keyboard within an arm's reach. 😜


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Mac OS partion not showing up

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