USBMate 1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular versions among the program users are 1.1 and 1.0.
USBMate for Mac lies within System Tools, more precisely Device Assistants. We recommend checking the downloaded files with any free antivirus. The unique identifier for this app's bundle is com.alice.mac.USBMate. The actual developer of this software for Mac is ZipZapMac. The latest version of USBMate can be downloaded for Mac OS X 10.6 or later.
From the developer:
USBMate is an app which optimizes and accelerates the operation of USB Flash drives, external hard disks and Flash memory cards.
Use USBMate every time before ejecting your USB Flash drive and its contents will be clean and optimized, without useless junk. All temporary files left by Snow Leopard / Lion/ Mountain Lion or Windows (.DS_Store, .Trashes, .Spotlight-V100, Thumbs.db, etc.) will be erased.
You may want to check out more software for Mac, such as 4Media iPod to Mac Transfer or Display Maestro, which might be similar to USBMate.