I'm sure that MMT3 will jump in but, if I had Snow Leopard, I would not run any utility that that was written before Snow Leopard existed. That's asking for trouble.

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P700, Photoshop CC, Lightroom CC, MS Office 365