I'm an experienced Myst player who just got a copy of RealMyst. Ick!!
It's runs terrible on my Dual 500 G4 in Classic Mode.
1. It runs at 1280 x 1040 on my 17" studio monitor regardless of what I set the resolution at start of game.... Resolution seemingly cannot be changed. Changing setting does nothing.
2. "Movement" dramatically lags behind a mouse move. To the point that it's almost impossible to walk around..
PowerMac dual 500 G4 - 986mb
OS 10.3.5 Classic 9.2.1
17" studio monitor