MP3 Trimmer 3.1

MP3 Trimmer is an efficient audio editing utility created especially for Mac OS X. This program enables you to trim, join, analyze, and repair your MP3 files within moments.
You can import an MP3 by going to File option from the main menu of the application or by using the drag-and-drop action over the interface. The utility allows you to prelisten to the imported file, select the start and stop position, and even apply Fade-In and Fade-Out effects.

You also have access to other editing options in case you need to join multiple MP3s into a single file, analyze the imported audio file for errors, and batch trim MP3s using the same output profile.

The trial version of the program prompts plenty of screens which block you from accessing the main window of the app for a couple of seconds. You can get rid of this issue by acquiring the full version of the utility (go to Internet panel from the main menu of the app and select the Purchase Registration Online option).

The one thing that I don't like about this program is its interface. The grey background of the main window combined with the small font just don't look good to me. It looks more like a Windows application rather than a Mac one.

Still, MP3 Trimmer provides you with high-quality output files and lets you choose from various editing options. I'd say it's worth giving it a try if you're looking for a simple yet effective solution to trim MP3 files on your Mac.