I was also able to create a USB installer for this and the MacOS Sierra can still be used without issue.
#Clean install macos high sierra how to
As noted, we’re going to completely erase everything on the Mac. Learn how to clean install your MacBook Pro from USB with macOS High Sierra.
#Clean install macos high sierra software
Though the intention is to only reinstall macOS system software and not impact anything else, things can still go wrong. How to Perform a Clean Install of macOS High Sierra Step 1: Backup Your Mac. You should back up your Mac before beginning this process. Is there a way to completely remove the partition, and do a clean install? I also was not able to unmount the partition. A clean install erases everything, a reinstall does not. When I try to delete the partition and always get the following error message:Įrasing "Macintosh HD" and Creating "Macintosh HD"Įrase process has failed. So, I went ahead and clicked First Aid scan the disk for error for the Macintosh HD partition but it also failed with an internal error. I spent a couple of hours trying to find a solution and one of them said that I need to delete the Macintosh partition or check on the partition disk for error first. Try running this application again (I tried this more than 5 times and still get the same error). This is the drive that you wish to format and make the clean install onto. Apple has released macOS High Sierra, which offers new features such as Apple File System, new features in the Photos app, improved video playback, and more. 7) Select Macintosh HD or whatever you’ve named your Mac drive. Whether you want to install High Sierra or reinstall. MacOS High Sierra should be listed at the top. Select Disk Utility from the list, then click Continue. To get it, open the Mac App Store and click the Updates tab. Now I want to clean install the existing OS using macOS High Sierra v10.13.6, I went to the recovery mode, connect to wifi and click on Reinstall but the issue that I encountered is whenever I try to install it I get the following error:Īn error occurred while preparing the installation. 6) The Mac boots into macOS Utilities (see image below), listing four options. 28, 2017 Like clockwork, Apple updates macOS on an annual basis. Hello everyone, I have an iMac 18,2 with the current operating macOS Sierra.
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