How to update M1 Mac Studio from 26.1 to 26.2 when software updater says it's up to date?

hirshstu wrote:

Thanks for your response. I was not a beta tester. I've tried pressing command + R in software update as well as pressing command + R and holding. Neither works. Should add that software update "checking for updates" runs for several minutes before telling me that 26.1 is current and up to date OS. Other suggestions?

Run this Terminal command

softwareupdate --list-full-installers

What does it report ?

hirshstu wrote:

I've not used Terminal before and don't know how.

Just launch the Terminal app and copy & paste the command provided by @Owl-53. Press the "Return" key to execute the command.

Please help me understand why/how using Terminal may help resolvemny problem.

That command will show us all of the full versions of macOS installers currently available for your system and it will also show whether any of them have been blocked (aks "deferred"). Unfortunately the macOS GUI interface doesn't allow for an easy way to figure out what may be occurring here.....the command line tends to provide more information when something fails which may provide a clue.

You may also just want to try a simple reboot of the computer. Many times a simple reboot can fix odd behavior. Also, Apple's servers may be a bit busy due to all of the released updates for various operating systems, that maybe macOS is not getting the updated information.

As an illustration of what the command can do

As outlined by one of my colleagues and for for greater details

 % softwareupdate --list-full-installers

Finding available software

Software Update found the following full installers:

* Title: macOS Tahoe, Version: 26.2, Size: 16975578KiB, Build: 25C56, Deferred: NO

* Title: macOS Tahoe, Version: 26.1, Size: 16890687KiB, Build: 25B78, Deferred: NO

* Title: macOS Tahoe, Version: 26.0.1, Size: 16550558KiB, Build: 25A362, Deferred: NO

* Title: macOS Tahoe, Version: 26.0, Size: 16550645KiB, Build: 25A354, Deferred: NO

* Title: macOS Sequoia, Version: 15.7.3, Size: 15286709KiB, Build: 24G419, Deferred: NO

* Title: macOS Sequoia, Version: 15.7.2, Size: 15285166KiB, Build: 24G325, Deferred: NO

* Title: macOS Sequoia, Version: 15.7.1, Size: 15286154KiB, Build: 24G231, Deferred: NO

* Title: macOS Sequoia, Version: 15.7, Size: 15285579KiB, Build: 24G222, Deferred: NO

* Title: macOS Sonoma, Version: 14.8.3, Size: 13338019KiB, Build: 23J220, Deferred: NO

* Title: macOS Sonoma, Version: 14.8.2, Size: 13337816KiB, Build: 23J126, Deferred: NO

* Title: macOS Sonoma, Version: 14.8.1, Size: 13335823KiB, Build: 23J30, Deferred: NO

* Title: macOS Sonoma, Version: 14.8, Size: 13336105KiB, Build: 23J21, Deferred: NO

* Title: macOS Ventura, Version: 13.7.8, Size: 11919053KiB, Build: 22H730, Deferred: NO

If you have previously installed beta versions, you need to unsubscribe to those. If you have not, in System Settings > Software Update, press Command-R to refresh the settings pane.

you've been given a couple suggestions which should work. but if they don't work, I think I would try and Start up your Mac in safe mode. then while in safe mode, see if the update becomes available.