This release provides our Mac users with a 64-bit version of the application for the first time, providing speed and memory benefits, as well as a much improved auto-updater for future version updates. For more information about the benefits of TuneUp 64-bit, please check out the Why is 64-bit better? help topic. 

There are also significant bug fixes in 2.4.6:

• Faster saving within the Clean window
• Fixed crash related to certain "m4a" formatted files
• Implemented a DeDuper "progress bar" to provide processing time and track count feedback after clicking the “DeDupe All” button.
• "Files" Sub-tab in DeDuper redesigned 
• More explicit error messaging in DeDuper when processing unsupported file formats