Not every Mac user can afford to upgrade to the latest and greatest, and some older Macs have a tight limit on how much RAM can be installed, and that impedes performance what with OS X Yosemite running on many older Macs, plus the growing number of 64-bit apps which require even more memory.
Here’s a cheap way to get a little more mileage out of an aging Mac, without having to spring for more RAM. Add SixtyFour to your Mac. This clever utility sets a preference in OS X which forces new 64-bit apps to run in 32-bit mode; and quite a few do. SixtyFour scans your Mac’s apps and presents a list of apps which can run in 32-bit mode. Click on the apps you use the most.
What happens when an app runs in 32-bit mode can be remarkable. The apps uses less memory, which means better performance on older Macs which don’t have the same memory as newer Macs. How much less memory is used? Tests show anywhere from a mere 10-percent reduction to as much as 50-percent, depending upon the amount of physical RAM and the app.
SixtyFour comes with three additional utilities to help justify the already nominal price tag. The Quick Look plugin displays additional app information. SixtyFour Agent displays an apps bit mode when it’s launched. And, the built-in process timer can help determine whether or not an app can run in 32-bit mode.
Just remember that SixtyFour works best on older Macs with nominal RAM. If your Mac is newer and has plenty of RAM, you’re not likely to see any notable change in performance. I’m not sure why the app is called SixtyFour. ThirtyTwo seems more appropriate, but 64 is twice 32, so maybe there’s a psychological marketing thing going on.