My mid year 2012 macbook pro is running Mojave 10.14.6 and after running the 9-25-20 secrity update it takes forever to start, shutdown or load programs. It will freeze and then unfreeze. It runs the same or worse when started in safe mode.

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My mid year 2012 macbook pro is running Mojave 10.14.6 and after running the 9-25-20 secrity update it takes forever to start, shutdown or load programs. It will freeze and then unfreeze. It runs the same or worse when started in safe mode.

My mid year 2012 macbook pro is running Mojave 10.14.6 and after running the 9-25-20 secrity update it takes forever to start, shutdown or load programs. It will freeze and then unfreeze. It runs the same or worse when started in safe mode. I have also reset the PRAM. There is 8GB of ram and 3.80GB is used for App Memory when there are no programs open other than the Activity Monitor. Does anyone have a suggestion?

MacBook Pro 15″, macOS 10.14

Posted on Sep 26, 2020 04:50 PM

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Answer 1

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BDAqua

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250,031 points

Sep 28, 2020 01:46 PM in response to bmacky

What OS were you on before???

Do you have a Time Machine backup to Restore to/from?

https://support.apple.com/guide/mac-help/revert-to-a-previous-macos-version-mh15216/mac

If not…

https://www.imore.com/how-downgrade-macos

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Answer 2

BDAqua

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250,031 points

Sep 27, 2020 08:59 PM in response to bmacky

Many people having those problems.

Try the standalone in Safe Mode, but not using Firefox...

https://itunes.apple.com/us/app/macos-mojave/id1398502828?mt=12

Safe Boot, (holding Shift key down at startup).

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Answer 3

bmacky Author

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Sep 27, 2020 06:33 AM in response to BenhaoQ

My computer seems to run better after it is left on for an hour or so. But then will take a long time to restart the next time I start it up. I do not understand why a security update would slow down the operating system. I hope someone will have a suggestion to make it better.

Thanks

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Answer 4

bmacky Author

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9 points

Oct 1, 2020 12:19 PM in response to BDAqua

Doing a restart and holding Control R took me to a screen to reinstall the OS. It installed Mojave and an older version of Safari was installed at the same time, so my Top Sites also came back. It is back to normal speed for an old computer.

Thanks to all for input.

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Answer 5

Oct 1, 2020 07:07 PM in response to bmacky

Keep in mind Safari 14 eliminates Top Sites. Also, the issues you are having have been experienced by many.

Both Safari 14.0 and Security Update 2020-005 were pulled and then replaced as of this evening to address many of the issues people are having. great resource

See this:

https://mrmacintosh.com/mojave-2020-005-security-update-causing-major-problems-updated/?utm_source=rss&utm_medium=rss&utm_campaign=mojave-2020-005-security-update-causing-major-problems-updated

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Answer 6

BenhaoQ

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9 points

Sep 26, 2020 05:11 PM in response to bmacky

I think it’s because the new system update, I am having similar issues

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Answer 7

bmacky Author

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9 points

Sep 28, 2020 06:45 AM in response to BDAqua

It is slower stating up in SafeBoot and is not any better once it starts. I think something in the security update has created the problem. I am hoping I can turn something off.

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Answer 8

BDAqua

Level 10

250,031 points

Sep 28, 2020 07:18 AM in response to bmacky

Yes, it is the Security/Update on several Macs, did you try reinstalling Mojave while in Safe Mode?

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Answer 9

neguy21

Level 1

4 points

Sep 28, 2020 08:50 AM in response to BDAqua

Same issue for me on late 2013 iMac - completely unusable in safe mode or regular boot. Had to run recovery mode to reinstall. this occurred twice and I had to turn off auto-update

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