Security update on Sierra high fails
Then tried to reload Sierra High from recovery, but could not find a disk to reinstall all disks greyed out in selection box including main HD, did a dick first aid everything seems fine.
MacBook
Apple’s Worldwide Developers Conference to kick off June 10 at 10 a.m. PDT with Keynote address
The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.
The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.
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Then tried to reload Sierra High from recovery, but could not find a disk to reinstall all disks greyed out in selection box including main HD, did a dick first aid everything seems fine.
MacBook
Hello and welcome to Apple Support Communities Alex_UK_Kent,
I see that when you try to do the security updates on your Mac it keeps failing. I'd be happy to look into this with you.
Let's have you try to unmount the disk. The steps are listed in the article below.
Unmount a disk set or disk member using Disk Utility on Mac
If you go through these steps and the issue remains, you'll want to try to reinstall macOS again. The article below can help if needed.
How to reinstall macOS from macOS Recovery
Let me know how this goes.
Hello and welcome to Apple Support Communities Alex_UK_Kent,
I see that when you try to do the security updates on your Mac it keeps failing. I'd be happy to look into this with you.
Let's have you try to unmount the disk. The steps are listed in the article below.
Unmount a disk set or disk member using Disk Utility on Mac
If you go through these steps and the issue remains, you'll want to try to reinstall macOS again. The article below can help if needed.
How to reinstall macOS from macOS Recovery
Let me know how this goes.
Security update on Sierra high fails