Add me to the list. Same problem with offline installer of BG3 V.4.1.1.6072089 on MacOS 15.1, M4.
When I unpack the *.pkg file manually, I can at least start the Larian Launcher, but of course this is not very helpful either.
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Edit: Redl'ed the whole thing a second time but no luck. I think I will give Gog Galaxy a try (hm, GoGal sounds like the brother of Shodan, doesn't it? ;-) ).
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Edit-2: DL'ed offline installer files via GoGal-BG3Game-Extras (same shit - different try), I also tried a manual pkg-install via terminal (same shit - different try; other mac games work without complaining, just tested again).
Therefore:
As long as nobody reports a successful installation from the offline files for MacOS, I assume that the installer is corrupt and needs to be fixed.
Seconded.
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Edit-3: Since I had to wait for the 4th download anyway I opened a support ticket. Maybe they look into those files. At least the download via GoGal worked perfectly and I have to admit that the program is quite convenient (and yes I’m looking directly at you guy who uploaded 55 single installation files - APFS can handle files larger than I can even imagine, just saying …). First game start was slower than romancing Shadowheart, but now BG3 runs fine.
Hey, hey, I’m playing Baldur’s Gate 3 on … a Mac, haha - these are crazy times, lol … ;-)
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Edit-4: I haven't heard anything from support, which was to be expected. They love their Mac customers.
So the current status looks like this: offline Installer does not work, GoGal recently had an update and now crashes on startup (but it only crashes halfway - you still have to shut it down manually), I've just got a new game on my hands and now I can't play at all - what a load of crap. And of course BG3 cannot be started manually outside of GoGal.
I had a look at Steam today ... hm ... they have quite an interesting portfolio of Mac games ... I'm just saying ...
Edit-4b: At least this is a known problem and a terminal input (/Users/Shared/GOG.com/Galaxy/redists/GalaxyCommunication) solves it.