An early taste of Plum
Cloud storage.
At home on
your Mac.
Build 23 is not ready for drive testing. It can open a tiny local test drive and incorrectly report no free space. We’re preparing a corrected, cloud-connected release. Keep your files outside this build.
We’re building a quieter home for your files: a native Mac drive with encryption at its heart. Start small with the notarized Plum alpha.
View the known issueApple Silicon · macOS 26.2 or later
v0.1.0 · Build 23 · What’s new
Managed setup. Copied data only.A familiar feeling
Your files shouldn’t
feel far away.
A drive belongs with the rest of your Mac. That’s where Plum is taking shape.
Less ceremony. More Finder.
A native macOS filesystem, designed around familiar folders and the apps you already use.
Private from the first byte.
File contents are encrypted on your Mac. Encrypted objects travel directly to storage; the control service coordinates the drive.
Built with a way back.
Checkpoints and Recovery Kits are part of the foundation, with recovery validation continuing through the alpha.
The current release
Small on purpose.
Honest by design.
This is an early, notarized alpha for people happy to take the first careful steps with us.
Read the release notesA real Mac app
Plum is Developer ID signed and Apple notarized, ready for your first careful look.
A managed start
Installing the app does not automatically provision a cloud drive. Volume setup and enrollment are still managed for this release.
A small test, not your only copy
Use a few small, copied files. Keep your originals and a separate backup. This alpha isn’t ready for your main folders.
Before you begin
A few simple steps.
A careful first run.
- 1
Download the alpha
You’ll need an Apple Silicon Mac running macOS 26.2 or later. Check the release notes for the exact build and download checksum.
- 2
Open Plum
Unpack the download and move Plum Probe.app to Applications. That’s the bundle name; the app opens as Plum. Already testing an older build? Follow the update notes first.
- 3
Use your managed setup
Complete the provided volume setup before using the drive. Begin with copies of small files and keep your originals somewhere safe.
Good questions
A little more detail.
Can I use Plum for my everyday files?
Not yet. This release is for managed testing with small amounts of copied data. Full mounted cloud workflows, sustained performance and long-term reliability are still being validated. Keep a separate backup, and don’t migrate an existing folder into Plum.
Does downloading it create a cloud drive?
No. The app download and volume provisioning are separate. This alpha still requires the managed setup instructions supplied for your test volume.
What does “notarized” mean?
The release has been signed with a Developer ID and submitted to Apple’s notarization service. That verifies the distribution process; it doesn’t mean the alpha’s storage and recovery validation is complete.
How do I get updates?
Build 23 uses manual updates. Download a new version from the releases page and follow its update instructions. If a Plum volume is mounted, eject it normally first. Never replace the app while its storage processes are active.
Made for your Mac
Try a little Plum.
A small beginning for a more spacious everyday.
View the known issueNotarized alpha · Managed setup required