Download and install Switch File Converter (see Resources).
Open the program and click on "Add Files."
Browse for the AIFF file you wish to convert, select it and click "Open."
Choose "MP3" from the "Output Format" drop-down list.
Check the box labeled "Output to Same Folder as Source Files," then press "Convert." Your file will now be converted.
Download and install Wavepad (see Resources).
Open Wavepad and click on "Open File."
Browse for the file you wish to convert, select it and click "Open."
Click on "File" and select "Save File As."
Choose "MPEG Layer 3" from the "Save As Type" drop-down list, browse for an export location and click "Save." Your file will now be exported.
Download and install AIFF MP3 Converter (see Resources).
Open the program and select "Options."
Select the "General" tab, choose "Browse" to select an output destination, and then press "Ok" to save the settings.
Click on "Add Files," browse for the file you wish to convert, select it and press "Open."
Select "to MP3" from the drop-down list underneath "Convert," then click on "Convert." Your file will now be exported.