A little update about my quest to check how SU18 will perform on Sequoia:
Installed SU18 on my friends MacBook Pro (15" 2018 2,2GHz 6-core i7, Radeon Pro 555X 4 GB, 32 GB DDR4) with Sonoma 14.4.1. While having issues with the ‘offline’ problem, I opened SU18 as a trial: that worked fine so far.
After this, I (at first) unsuccesfully tried to solve the ‘offline’ notification with this procedure, until recognizing the machine actually still IS offline. Solving this solved the ‘offline’ notification.
But unfortunately it appears it wasn’t this machine on which once I licensed my SU18, since it tells me “oops, this license has been used on too many computers.”
Okay… what options are left?
First, I wanted to check SU18 on my spare “MacBook 13” from 2015", and SU18 on this machine appears not licensed. Strange, since I used this machine ‘licensed’ back in 2022 (while checking old SU-files).
So apparently there’s only one copy of SU18 licensed on machines I can access, my main MB.
Theoretically I could unlicense this copy, license my Sequoia running girlfriends MB, checking SU18 workability, and (un)license it back on my main machine.
But it seems this is quite risky… Maybe just upgrading to Sequoia with my main MB delivers better chances running SU18. Hmmm…
(@colin - are you able to check what kind/type of machine are licensed with my SU18 license?)