I was able to resolve the issue and restore the computer to proper working order by eliminating the current 2020-001 update process via the following terminal command. and you are using a Mac that can save the contents of a RAM disk after a restart, you may get. Standard troubleshooting tools like Reset Pram do nothing. Fix - It 4 on updating and installing system software. ![]() The computer simply not longer shuts down properly. However, any attempts at completing the update or even trying to do a standard shutdown/restart result in same problem. If the issue continues after reinstalling. Use safe mode to try to isolate the cause of the issue. Click Move to Trash, then contact the software developer to see if a software update is available. A hard reboot gets the machine back on and running. If your Mac suspects that a particular app caused the restart, it might ask whether you would like to move the app to the Trash. When trying to install this update for High Sierra 10.13.6 (Mac Pro 5,1) the computer attempts to shutdown, the screen goes black indefinitely, but it never actually shuts down or updates. I haven't tried this myself, but other users who did reported that it worked for them. Select your Macintosh HD volume on the left, then click on the First Aid tab in the tool bar. When the Utility Menu appears select Disk Utility, and press the Continue button. One user solved a similar issue that your having, although on the prior 001 update, by using the Terminal. Immediately after the chime press and hold down the COMMAND and R keys. Previous shutdown code -128: Possibly about memory issues. Solutions: Reboot in Safe Mode/use another user account. Previous shutdown code -61: Unresponsive apps causing iMac shutting down. Workaround: Run Apple Diagnostics to check hardware issues or check Mac's ventilation. Select the indented (usually, Macintosh HD) volume entry from the side list. Previous shutdown code -3: Multiple temperature sensors exceed the limit. Select Disk Utility and click on the Continue button. Of course it gets the occasional restart, whether for updates or 'just. Immediately after the chime hold down the Command and R keys until the Utility Menu appears. Less wear and tear (heating / cooling cycles). Then, hold the power button for further 10 seconds while holding the aforementioned keys. The rest of the time I simply let it go to sleep. Hold left Control button + left Option button + right Shift key for about 7 seconds. You can find a lot of help by searching on the Apple Support Community site for 2020-001 Security Update High Sierra. The only time I shut down my Mac is if I will be out of town for more than a day (and when I do, my entire computer desk gets powered down and unplugged, the cable modem too). ![]() There were similar issues with the 2020-001 update.
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