Convert aiff to prores

Download and install the latest version of Filestar.
Right click on one or more Aiff file(s) on your desktop and select Convert with Filestar.
Type convert to prores in the search box.
Press Convert.

What is the difference between .aiff and .prores?

Name: Audio Interchange File Format; Apple ProRes
Extension: .aiff; .prores
Format: Binary; Binary
Category: Audio; Video
Developer: Apple
Description: High-quality audio file created using the (AIFF) file format; contains CD-quality audio stored in a non-compressed, lossless format, similar .WAV files; commonly used to burn audio CDs.
MIME Type: audio/aiff; video/quicktime
Sample: sample.aiff
Wikipedia: .aiff on Wikipedia; .prores on Wikipedia