MP 1,1-5,1 Mac Pro 5,1 Strange Connectivity Issue

[5comma1]

Greetings,

I'm experiencing three strange connectivity issues that I'm quessing are related.

1) I'm unable to update or purchase apps on the App Store. The progress circle-icon spins but nothing more. Please see attachment.
2) Apple Calendar app is giving repeated error messages. Please see attachments.
3) Using Safari, when I click the reCaptcha checkbox to access my PayPal invoicing account I get an unending progress wheel. This works as it should in Chrome, however. Please see attachment.

- I restarted the Mac.
- Restarted the modem and router.
- Made sure my VPN was off.
- Did an internet speed test... no issues there.
- Called Apple tech support— the support person said she felt one of the recent Mojave security updates may have broken something. She felt an update to Catalina or Big Sur would likely fix everything, and of course neither OS upgrade is an option for the awesome but aging 5,1 natively.

My other Mac is an early 2013 Macbook Pro, also running 10.14.6. I'm experiencing the same App Store and Calendar issues with it, but not the PayPal reCaptcha issue using Safari. Strange stuff?

Anyone else experiencing these kinds of buggy issues with their 5,1'? Any troubleshooting suggestions?

Thank You!

• Mac Pro Mid 2010 5,1
• OS X 10.14.6
• 2 x 3.33 GHz 6-Core Intel Xeon
• GPU: AMD Sapphire Radeon HD 7950 (Mac Edition)
• Memory 48GB > 6 x 8gb > 1333 MHz DDR3
• Boot Disk: 500GB SSD
• Firmware Version: 144.0.0.0.0

 

[MarkC426]

There is most definitely an issue after latest SU.
See here for solution:

Updating to Security Update 2021-001 / 2021-002 Mojave

Since today it's happening to me as well on Mojave. I updated the security update 2021-002 sometime ago I was able to update apps till two days ago Only solution is to follow what a lot of other users are doing macOS 10.14.6 Mojave - can't update mac a… - Apple Community While running App...

forums.macrumors.com

 

[5comma1]

Thank you, MarkC426— for directing me to a thread on the topic. Much appreciated! ?