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While after attempting to install an update to my iMac running High Sierra I received the message shown in the attached picture. I've restarted several times and continue to get the error message. Any suggestions?
Yes I think so...
You can use Drive DX to possibly get a better view of Drive health…
https://binaryfruit.com/drivedx
Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode?
Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.
If that doesn't do it, we might find the problem with an etrecheck report.
EtreCheck is a FREE simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.
Pastebin is a good place to paste the whole report if you capture the URL while there…
Whew, they've changed pastebin & made it harder, but after pasting in, click Create new paste button, then Embed button, then copy the URL...
<script src="https://pastebin.com/embed_js/KuvnghqA"></script>
The important part is...
https://pastebin.com/embed_js/KuvnghqA
Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...
I restarted in recovery mode and have initiated a reinstallation of High Sierra. I hope it works.
The iMac started this morning without any trouble. I examined its hard drive with Drive DX and have attached the report. The only error reported is this:
And what happens if you restart?
If I click the Restart button I see the same error message in a few minutes. If I power cycle the computer I also see the same error message in a few minutes.
OK, good move John.
High Sierra was successfully installed, as was the update available in the App Store. All is well!
Great to hear, take care my friend. :)
The iMac did not boot up all the way when I started it this morning. This afternoon a restart was successful. I wonder whether there might still be some sort of problem.
Looks pretty good, I'd run the test again in a week or so & see if we still get that one error... hopefully it was a one off thing.
Can't restart iMac after attempting to install update to High Sierra
