The only difference as far as I can tell is that the Press Pack is lacking support for the M.A.M.E., which is arcade machine emulation software. Press Pack and an OpenEmu Experimental Press Pack.

VPN Deals: Lifetime license for $16, monthly plans at $1 & more Getting OpenEmu It automatically organizes the titles into the various systems that they were created for and makes it easy for you to configure keyboard, gamepad, and joystick controller inputs.

You just need to download the installer, choose the emulators you want to freely download, and then drag and drop your saved titles to the program window. OpenEmu makes it exceedingly easy to get you up and running your favorite older generation titles from a multitude of systems such as Atari, Nintendo, Sega and even arcade systems. OpenEmu is a free (you can donate if you like their software) and open source graphical front end for many software emulators (which in turn are also open source). Our favorite emulation software comes from OpenEmu and we'll show you how to get it up and running. You're going to need some emulation software to help you get started. If you're thinking about your childhood games on Atari, ColecoVision, or that old Commodore 64, you can relive those memories with retro gaming on your Mac.