Hello everyone, I have the same issue and am on a Mac as well. I haven't really been able to get TS3 to work successfully for years, even before the forced 64-bit update, and every time I think to try again it's something new.
An addition to this issue I have that makes it impossible to use the "Downloads Dashboard" workaround from in-game is that the launcher and app will not recognize my TS3 store credentials. I opened the website in my web browser to log in and it worked just fine. I tried downloading them from the website, and I saw it add an exclamation point to the Downloads tab in the launcher but I dare not click it since that's what broke it before and turned it into an endless cycle of crashing. I then thought I might try the Downloads Dashboard and see if it will let me install from there, but I just have an endless spinning plumbob saying "Connecting."
I think my main issue is not being able to log in. I looked up this issue separately and all I found were similar advice of turn off your VPN, turn off private relay, etc. etc. all of which I have done, to no avail. I also saw plenty of advice for Windows users that I cannot use, of course.
I'm pretty frustrated as well. All I want is the two worlds I have that I've had for over a decade, Hidden Springs and Riverview. I used to have them installed but due to a totally different issue years back I had to do a total clean install of TS3 and so I lost the worlds. Replying in case Maxis ever decides to fix this. I find it insane that they're still allowing purchases of packs and content from the TS3 store knowing that Mac users basically cannot use TS3 as a whole if they want new packs or store content.
