1951FDG has released SixtyFour 1.0, its new memory optimizer for Mac OS X. It’s compatible with any 64-bit-capable PowerPC or Intel Mac running Mac OS X 10.5 or higher (including Lion).

SixtyFour was specifically created to force 64-bit apps to open in 32-bit mode for G5-based and 64-bit-capable Intel hardware. It lists apps that will open in 64-bit mode by default and facilitates the changing of a preference to force the apps to open in 32-bit mode. Forcing a 64-bit app to open in 32-bit mode reduces its memory usage significantly and its startup time and an increase in overall system performance, according to the folks at 1951FDG.

For an app to be listed it must meet two conditions: the app will open and the app will open in 64-bit mode by default. Other 64-bit apps that don’t meet these two conditions won’t be listed because they will not open or open in 32-bit mode only.

The way SixtyFour works is simple. A selected check box indicates that the application will open in 32-bit mode, a non-selected check box indicates that the application will open in 64-bit mode and a disabled check box indicates that the application will only open in 64-bit mode.

For a limited time only, SixtyFour is “pay what you want” software. (the buyer pays what he wants/can pay). For more info go to http://www.1951fdg.com/ .