Can't install macOS Catalina 2021-005 Security Update on MacBook Pro 10.15.2

patfarre wrote:

I can't install macOS Catalina 2021-005 Security Update on hard drive because "The volume does not meet the requirements for this update." I have 19GB space available and my system version is 10.15.2

SSD like to have 20-25% free storage at all times— it appears you are choking the machine w/ a meager 19GB space available.

Do some some housekeeping and clear some storage.

The stable release of Catalina is 10.15.7

I would start there.

Update macOS on Mac - Apple Support

patfarre wrote:

Sarcasm is really helpful. Thank you.

Call Customer Support (800) MY–APPLE (800–692–7753)

or on line https://getsupport.apple.com/

or call AppleCare Support at 1-800-APLCARE (800-275-2273)

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

https://support.apple.com/en-us/HT201232

patfarre wrote:

I tried to install macOS Catalina 10.15.7 Update. I got the same error message: "macOS Catalina 10.15.7 Updatecan’t be installed on this disk. The volume does not meet the requirements for this update."

Do some some housekeeping and clear some storage.

To put required storage in context:

Years ago, MacOS was said to require over 9GB to go from cold start to fully functional. I am sure than number has only increased.

patfarre wrote:

Both Updates are about 3GBs. So storage is not the issue.

If you say so...