On Monday, Apr 19, 2004, at 17:36 Canada/Eastern, matblack at mac.com wrote: > Unless something has changed that I'm unaware of, having multiple > versions of OS9 is a way bad... Under "Classic" Mac OS (v9.x or earlier), one should only have a single System Folder on a given volume (but on a given machine one may have several System Folders, as long as they are on separate volumes). This limitation may be bypassed by using various utilities which "bless" a particular System Folder. Under OS X, one may have more than one System Folder (not System folder!) on the same volume, although only one may be active at any one time. Before using Classic, one of them must be selected in the Classic prefpane. In fact, under OS X it may even be a good idea two have two System Folders, one with a minimum set of extensions and drivers to be used for Classic, another with a full set of extensions to be used to boot the machine (obviously, this doesn't apply to Macs which can only boot in OS X). f