You might try with EmuVariableUefi-64.efi and the RC scripts.
Thanks for the suggestion!
To be fair, I've never actually even
used (i)Messages apart from my random hackintosh attempts, so I don't miss it at all.
But just for the sake of it, I installed the latest Clover version, RC scripts to target, applicable drivers. Rebooted, didn't work.
Created new serials, copied mlb to rt vars, didn't work.
Created another set of new serials, copied first 12 digits to mbl, copied mlb to rt vars. Installed emuvariable through Clover Configurator as well just to be sure, logged out of iCloud, rebooted with VPN Killswitch turned on, connected VPN, logged in to secondary iCloud account, logged in to messages, didn't work.
Just like my previous (vanilla hackintosh), it seems like my Messages login attempts are either ignored (having to press 'login' a bunch of times, or seemingly logging in except when going to prefs it turns out I'm not logged in at all), or, on the other hand, I might get some authentication error code that I should forward to apple's customer support.
Anyway, if there's an easy fix I'd love to hear. Perhaps my experiences are similar to someone else's, in that case we might be able to compare some details. For now though, I'm not really bothered since everything still seems to be working tremendously