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Security Update 2020-003 High Sierra June 1 2020 on iMac with High Sierra can not be installed

I can not install this update on an iMac with High Sierra 10.13.6 iMac (27-inch, Mid 2011). Tried two times. it downloads but can not install.


Security Update 2020-003 High Sierra


Posted on Jun 7, 2020 3:14 AM

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Question marked as Top-ranking reply

Posted on Jun 9, 2020 8:45 AM

I had serous issues with SecUpdates from the App Store update page over a year ago and since, when I get a notice a SecUpdate is available, I now go to the Apple Downloads site:


Apple - Support - Downloads


Not a hint of trouble since on out three most-used Macs in the home office.


Note: After installing from the download page, the App Store updates pager(10.13 and earlier ) or System Prefs >Software updates, may continue to show the update available for a couple of days but it will go away with no action required on your part.

6 replies
Question marked as Top-ranking reply

Jun 9, 2020 8:45 AM in response to nlesh

I had serous issues with SecUpdates from the App Store update page over a year ago and since, when I get a notice a SecUpdate is available, I now go to the Apple Downloads site:


Apple - Support - Downloads


Not a hint of trouble since on out three most-used Macs in the home office.


Note: After installing from the download page, the App Store updates pager(10.13 and earlier ) or System Prefs >Software updates, may continue to show the update available for a couple of days but it will go away with no action required on your part.

Security Update 2020-003 High Sierra June 1 2020 on iMac with High Sierra can not be installed

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