I've tried both of those, and neither seem to work. It might be just how old my computer is as well, as I've been needing to upgrade for a while now (I'm on High Sierra).
Viewing post in Crossdressing in Camelot comments
That could be the case. I haven't been able to find much for other possible solutions online. You could get the web version and run it through your browser. It has issues with the character creator and you'll need to apply the "web version only required patch" (after applying patch 0.34.11), but it should at least be playable. (If you get a “DataManager.checkError” with the web version this should provide a solution. https://www.reddit.com/r/RPGMaker/comments/dqvdqo/fix_error_failed_to_load_dataactorsjson/ )