Parallels on Snow Leopard needs MacFuse 2.19
After much time spent with Parallels tech support, and then researching about MacFUSE, I mostly resolved this issue by installing MacFUSE version 2.1.9.
The basic issue, as Parallels tech support admitted, is the alarmingly not-advertised fact that Parallels 6 as shipped does not actually run correctly on Snow Leopard (insofar as VM disks are not in fact mountable in the host OS), because Snow Leopard is a 64-bit operating system, and the version of MacFUSE shipped with even the latest Parallels 6 is an old version that does not support 64-bit OSes.
Last edited: Apr 18, 2011