robinbear80 The first is a known issue, and the only workaround is to disable Advanced Rendering, which of course lowers the graphics quality overall, so it's not a great trade-off. Feel free to post in the master thread if you want:
[CURRENT ISSUE 64-bit] Walls/floors cut away to display snowy roads | EA Forums - 11185408
The third has been reported in the 64-bit Mac version before, and I don't know of a workaround.
The second is an occasional issue in all versions of the game. One of the causes is the world not having any inactive performers with a high-enough skill level for the venue in question. So I would test in Starlight Shores, where there are enough sims with the requisite skill to perform at any venue.