Convert M4A to AAC on Mac
Turn M4A Audio files into AAC Audio right on your Mac — fully offline. No uploads, no watermark, no size limit. Drag in one file or a whole folder and convert in seconds, accelerated for Apple Silicon.
How to convert M4A to AAC on a Mac
Open Offline Converter for Mac and drag your M4A file (or many) into the window.
Choose AAC as the output format and adjust quality or size if you need to.
Click Convert — the AAC file is saved straight to your Mac. Done, offline.
Why convert M4A to AAC locally
Your files stay private
Your M4A files never get uploaded. Everything is processed on-device, so sensitive photos and documents stay yours.
No watermark, no limits
Convert as many M4A files to AAC as you want — no watermark, no size cap, no daily quota.
Fast on Apple Silicon
Conversion is hardware-accelerated and runs at the speed of your SSD, even for large batches.
About M4A and AAC
M4A Audio. M4A Audio is a common audio format. AAC Audio. AAC Audio is a widely supported audio format.
M4A to AAC — FAQ
Is converting M4A to AAC free?
You can convert M4A Audio to AAC Audio on your Mac with the free trial. There's no watermark and nothing is uploaded.
Do my M4A files get uploaded?
No. The conversion happens entirely on your Mac. Your M4A files never leave your device — it even works offline.
Can I convert many M4A files at once?
Yes. Drop a whole folder of M4A files and convert them all to AAC in a single batch.