![]() The effect of using clones is that the aggregate size of a bunch of files can be smaller than the sum of the same files taken separately.įor now, macOS does not provide DaisyDisk any way to detect the APFS clones, but fortunately, their use appears to be very limited on a typical APFS disk. Your startup disk is also a container, and beside your data, macOS keeps some hidden system volumes there.įor this reason, in DaisyDisk, you will notice a new opaque component inside the hidden space - “other volumes”, typically a few GB.īesides, if you create your own APFS volumes, they will be included into the “other volumes” too.ĪPFS introduces clones - a more fine-grained analog of hard links. In APFS, every physical disk is a container that can have multiple volumes inside, which share the same pool of free space. Instead, DaisyDisk provides other macro-level tools for viewing and reclaiming the purgeable space.ĪPFS introduces space sharing between volumes. In DaisyDisk, unlike previously, the APFS snapshots cannot be revealed by scanning as administrator. Snapshots older than 24 hours are deleted automatically.Ĭonsequently, About This Mac > Storage may now show the System category taking too much space on macOS High Sierra. Over time, as you make changes to the data on your disk, the snapshots may pile up until 80% of disk capacity is taken. In contrast to HFS+, APFS doesn’t delete its snapshots until really necessary. ![]() Time Machine now uses them to create its hourly local snapshots, which are the main contibutor to the purgeable space. The snapshots are cheap and fast to create and delete, they don’t consume additional disk space. Here are a few things to keep in mind when working with APFS disks and DaisyDisk:ĪPFS introduces snapshots - a new way to create instant snapshots of your entire disk. If you’re interested, here’s a deeper look on APFS features. ![]() (This happens by default when you install macOS High Sierra or newer on Macs with SSD drives, such as MacBooks.) You, as a user, will hardly notice any change after switching to APFS. The best thing about APFS is that it just works. It’s more scalable, more reliable and more feature-rich compared to its predecessor HFS+. Starting with macOS High Sierra, Apple introduced its new APFS file system on Macs.ĪPFS is a state-of-the-art file system, optimized for the now dominating solid-state drives. User Guide About Apple File System (APFS) It just works
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