I have some older Mac OS X versions that are betas, haven't had them running in a long time since my Digital Audio wont boot them, if I get another Blue White G3 I will test them to see what they are. The Betas are fun to mess around with. I used ot have so many more that i had backed up on a server which i can no longer access. I may back them up again if I find a suitable server that will be online for a while.