A friend upgraded her Core2Duo Mac Mini from Snow Leopard to Mountain Lion yesterday. Unfortunately, her version of VMWare Fusion and who knows what else are not compatible. And she depends on this Mac to run her entire business... We have until Friday to fix this. Unfortunately, she did a SuperDuper! backup immediately after doing the upgrade, so doing a restoration from a backup clone is out. She does not use Time Machine. Doing all the upgrades isn't an option with such a short time-frame. So my plan is to reinstall Snow Leopard so that Fusion and her other apps will run normally until we can get this sorted-out. Am I likely to run into any problems with this scenario?