Download Deylee for macOS.
Unzip, drag into Applications, sign in once. From 0.3.0 onward Deylee keeps itself current, so this is the last file you fetch by hand.
macOS 14 (Sonoma) or newer · no account needed to install
At a glance
- Latest
- 0.8.0
- Released
- 28 Sep 2026
- Requires
- macOS 14+
- Signed
- Self-signed cert
- Notarised
- Not yet
- Auto-update
- Yes, signed
- Account
- Needed to start
Every update is cryptographically signed, and an archive that fails that check is refused rather than installed.
Installing takes about a minute.
Unzip and drag
Open the download and drag Deylee into your Applications folder.
Allow it once
macOS will stop the first launch. The section below explains why, and the two ways past it.
Sign in, press Start
Google or an email address and a six-digit code. Afterwards Deylee reads a stored session and works with no network at all.
Please read this before you install
macOS will warn you about Deylee. Here is the honest reason.
Deylee is signed, but with our own certificate, not with an Apple Developer ID, and it has not been through Apple’s notarisation service. Both need a paid Apple developer account, and Deylee is not funded yet. We would rather tell you that plainly than let you think the warning is a macOS quirk.
Only Apple’s own root ships inside macOS, so an app signed by anyone else is treated as unidentified. The dialog says Deylee cannot be checked for malicious software. That is a statement about who vouched for the file, not a finding about the file. Gatekeeper has not looked inside and found something; it has found no Apple signature to trust.
You should not simply take our word for it. If you are not comfortable stepping past a warning, please wait. Notarisation is on the list, and nobody should feel pushed into an install they cannot verify.
Once you have allowed it, you are not asked again. Since 0.4.3 the app is signed with a stable certificate, so every future version satisfies the same permissions instead of arriving as a stranger.
The gentle way, no Terminal
- Open Deylee once. Let the warning appear, then dismiss it.
- Go to System Settings → Privacy & Security and scroll to the bottom.
- Beside the note about Deylee, click Open Anyway and confirm with Touch ID or your password.
This is the route we recommend. It is a one-time step.
Or, in Terminal
Removes the quarantine flag macOS attaches to anything downloaded from the internet. Run it after the app is in Applications:
xattr -dr com.apple.quarantine /Applications/Deylee.appIt changes one attribute on that one app and nothing else on your Mac. If a command you did not write makes you uneasy, use the Open Anyway route above instead. It does the same job through the interface.
If you are asked for a Keychain password
Expect one round of Keychain questions on the first launch of a new version. Answering Always Allow is what makes it stick. If your Mac password is refused, that is a different, older prompt. Dismiss it and relaunch.
Already running an earlier build?
Download this one and replace the app. Your history and your session carry over. This version upgrades the local database, so an older Deylee will refuse to open it afterwards and say so plainly rather than write rows it does not understand.
0.2.1 and earlier cannot update themselves, because the machinery that does it arrives in 0.3.0. This is the last manual download for those builds.
Two notes for old installs
From 0.1.0: sync did not actually work in that build. If you signed in and nothing arrived on a second Mac, that is why, and the stranded history is sent on first launch.
From 0.2.0: a backup exported on that version names the account it belongs to. 0.2.1 withholds it. Export a fresh one and replace the old file.
Deylee is still early.
Whatever gets built on top of it, only hours will ever leave your Mac.