Yes, I think I am experiencing something similar. I was inspired to try to play TS3 again after having a look around this forum, and I was able to convert my old disc to the 64 bit version on origin but once I get to this loading screen, it either won't load beyond this point or if it does load fully, it will be glitchy and flickery and impossible to actually click on anything. This is all on my first attempt to load the game, there is no CC or saves or anything, I literally just installed it so idk what to do. I guess I might just be stuck playing TS4 haha.
I know that the TS3 does have long loading time on the initial screen, but just HOW long should I have to wait?
EDIT: I have a macbook pro 13 inch 2020. I honestly don't know what half stuff being in discussed about specs and other stuff even means, I am a simple person when it comes to computer lingo lol
https://i.imgur.com/8GhafmT.png