Thanks again for all the replies. I've been a Mac person since 1986 and played CMx1 back when - not often and not enough. My M1 MBP wasn't bought to play games - the only ones I have are Diablo III and CM:BN which I need to really relearn to play. Glad to know I won't blow CM up with an OS upgrade.
While I haven't played it much, I do think CM:BN works under MacOS 13 (Ventura). Thinking about upgrading to MacOS 14 (Sonoma) - not seeing anything in the forum on if CM:BN works or not with the new OS - any one out there with any experience either way? Thanks!