On MacOSForge, Apple has announced that they are releasing the Apple Lossless Audio Codec as an open source project:
The Apple Lossless Audio Codec (ALAC) is a lossless audio codec developed by Apple and deployed on all of its platforms and devices for some years now. Apple is making the Apple Lossless Audio Codec (ALAC) available as an open source project. Full details can be found on the Apple Lossless Audio Codec project page.
The Apple Lossless Audio Codec is a similar to other "lossless" codecs such as FLAC which offer audio compression without any loss in audio information. ALAC is said to compress files only by "about half" as compared to the originals.
Formats such as MP3 and AAC are considered "lossy" and result in much greater compression but at the cost of some fidelity. The main advantage of using ALAC over competing lossless formats is that ALAC is supported by all of Apple's iPods and iOS devices. The format had already been reverse engineered prior to this release, but this opens the door to even more products supporting both ALAC creation and playback.
Thursday October 8, 2026 9:04 am PDT by Juli Clover
Apple today announced an upcoming product launch that will take place on Tuesday, October 13. We are expecting Apple's announcement to focus on new smart home products, including the long-rumored smart home hub, a new Apple TV 4K, and a refreshed HomePod mini.
Subscribe to the MacRumors YouTube channel for more videos.
The home hub is an all-new device that's like a cross between an iPad and...
Thursday October 8, 2026 1:31 pm PDT by Juli Clover
Apple will introduce new OLED touchscreen MacBook Pro models and an OLED iPad mini "on or around" Tuesday, October 27, reports Bloomberg. The launch will also include an M6 14-inch MacBook Pro and an M6 iMac.
The October 27 follows Apple's October 13 debut of a new smart home hub, a revamped Apple TV 4K, and a refreshed HomePod mini. Earlier this month, MacRumors reported that Apple would do ...
Thursday October 8, 2026 3:59 pm PDT by Juli Clover
Apple is planning to introduce new products on Tuesday, October 13, Apple marketing chief Greg Joswiak announced today. It won't be a traditional Apple event, but Apple has invited some members of the media to New York City to get some hands-on time with whatever's introduced.
Subscribe to the MacRumors YouTube channel for more videos.
Those of us not invited to the New York Experience are...
The main advantage of using competing lossless formats is that they are supported by ALL devices on any platform.
They're not. Many devices do not natively support FLAC. iOS devices will natively support ALAC, so that will outnumber "all devices" as you put it.
Can someone explain what "half as much" means? I though the ALAC didn't create fidelity loss. Or is some compression possible without such?
It doesn't create loss in sound. It's a lossless format. What they mean by compression is the file size. So if the original file is 30MB, ALAC compression will make it 15MB in file size but still sound like the original, with no loss of audio.
Android's market share has long surpassed that of iOS. I'd say theres little debate over which open source format will have more success.
Not to start a platform argument, but Android's marketshare may be bigger than the iPhone's. But if you include all iPods (non iOS ones), iPod Touches, and iPads, that market size is certainly still bigger than Android. In terms of devices which support ALAC.
Good news for widespread support, but one wonders why Apple didn't just go with FLAC in the first place.
As with most things Apple, presumably because they thought they could do better. They don't tend to do anything that they don't think is an improvement on something that already exists. If I recall correctly, isn't ALAC about half the file size?
The main advantage of using competing lossless formats is that they are supported by ALL devices on any platform*.
Apple's first foldable iPhone, with a book-style design featuring a 5.4-inch outer display and a 7.6-inch inner display with a minimal crease down the middle.
On MacOSForge, Apple has announced that they are releasing the Apple Lossless Audio Codec as an open source project:
