Quote - OS X lets you format your disks to be case sensitive. Is your disk formatted so? If so, maybe this is the first version of poser that cared...

I have a bunch of old runtimes that worked fine in poser 8, and I haven't encountered any that aren't detected. I am still using 10.6, though. 

 It's not formatted to be case sensitive. In fact it's NTFS formatted. I'm using Tuxera to access the drive. I share it with my dual boot Windows 7