With this update Bartender 4 will display a message on macOS Sonoma prompting the user to download Bartender 5.

Find out more about Bartender 5 at https://www.macbartender.com/Bartender5/

Bartender 4 is not optimised for macOS Sonoma. If you do not want to upgrade to Bartender 5 and wish to continue using Bartender 4 you might want to avoid installing macOS Sonoma.

I have made Bartender 4 as compatible with macOS Sonoma as possible. Including re-introducing Show for Updates, NOTE: the macOS purple "Bartender is capturing your screen" menu bar item will show for any image comparison Show for Updates.
Also there are some deeper macOS changes Bartender 4 cannot take into account, which could cause odd behaviour sometimes.

When changing between light and dark menu bar some menu bar items icons/emoji would have their opacity changed, this could be enough for the image comparison to trigger a change, this is now taken into account.

When changing spaces with the mouse cursor sitting over a text field, the cursor would not change from the default pointer to the caret cursor. This has been fixed.