To convert MP4 to MP3 offline on Mac, you can use the Apple Music App. Once the app is launched, select the video to convert, go to File > Convert, and choose MP3. Click Convert Format to proceed in converting the MP3. Select Audio and then click the M4B format. Click the button Convert/Export to start the conversion. After the conversion, just search the files in the search bar, and you will be able to use the file in your desired format. Part 3. The file formats it supports cover what the desktop application can convert (MP4, MKV, MP3, WAV…). Convert MP4 to MP3 online, Convert OGG to MP3… These are all plausible with a few clicks. Features: Easy operation and same quality as PC Fantastic conversion speed. Online Audio Converter – The Free & Fast Online MP3 Converter for Mac These are the best recommended YouTube to MP3 converters for Apple Mac OS X: Youtube Converter 1: MediaHuman's Free YouTube to MP3 Converter. MediaHuman's Free YouTube to MP3 Converter offers fast conversions with superior fidelity, for exceptionally clear MP3 files. It works well not only with YouTube, but also Vimeo, Soundcloud, Dailymotion 9. MPEG Streamclip. If you want a flexible, simple free MP4 converter for Mac, this is the tool for you. MPEG Streamclip works with many video conversion projects, and does have an option for Export to MPEG-4. You can modify video preferences when it comes to frame rate, bit rate as well as sound quality. Step 1. Load MP3 files. To start with, please import your MP3 files to the software with drag and drop method. Alternatively, you can load MP3 files by clicking "Add Files" on the main menu. Step 2. Select M4A or AIFF as the output format. Method 1: Using Zoom desktop client. If you’re running the Zoom desktop client version 4.6.10 or later, you can manually convert meeting recordings by following the steps below. Step 1: Open the Zoom app on your Mac and click on the Meetings tab at the top. Step 3: Select the meeting whose recording you want to convert and click on the EfkUC.