macOS Tahoe 26 on Unsupported Macs Discussion

[oldmacs]

This may be a dumb question, apologies in advance.

I've installed OCLP for a couple of friends and family members - I had advised them not to install macOS 26, but one has accidentally - so I'm going to have to erase and reinstall Sequoia I suppose.

How do I totally block Tahoe from installing? I turn automatic updates totally off on Macs I do OCLP on but this doesn't prevent them from getting confused when doing point updates for Sonoma or Sequoia.

 

[TOM1211]

This may be a dumb question, apologies in advance.

I've installed OCLP for a couple of friends and family members - I had advised them not to install macOS 26, but one has accidentally - so I'm going to have to erase and reinstall Sequoia I suppose.

How do I totally block Tahoe from installing? I turn automatic updates totally off on Macs I do OCLP on but this doesn't prevent them from getting confused when doing point updates for Sonoma or Sequoia.

I think best one is as posted above is just to put it on Beta updates for Sequoia then it doesn’t see Tahoe at all as I quick fix if you can or not block Apple updates with a firewall has always been debatable without interfering with other things.

 

[imacker2011]

There is also this script, which is designed to prevent Tahoe updates appearing for 90 days. I use it on several different machines with Sequoia 15.7. Quite easy to install also.

It is some kind of MDM policy management accessible through system settings.