The 0.1.0-rc.3 installer is published on GitHub Releases as Loupist-macOS-arm64.dmg. If the release page is still empty, the build is on its way.
Four steps, one of them only once.
1
Download and drag
Download Loupist-macOS-arm64.dmg from the Loupist GitHub Release, open it, and drag Loupist to Applications.
2
Open it once
Open Loupist from Applications. macOS will refuse the first time, because this Beta is not notarized by Apple. Close the warning without deleting the app: click OK on macOS 13 or 14, or Done on macOS 15 or newer. Do not click Move to Trash.
3
Allow it
Open System Settings, then Privacy & Security, and scroll down to Security. Next to the line about Loupist, click Open Anyway. On macOS 15 or newer, confirm with Open Anyway again. Enter your login password if macOS asks. The button stays for about an hour after the previous step; if it is gone, repeat that step.
4
Done
From then on Loupist opens normally. Updates install inside the app, with your confirmation, and do not ask again.
Why macOS warns you
Apple’s notarization requires a paid Apple Developer membership, which this Beta does not have yet. The app is signed with Loupist’s own certificate instead, so macOS can tell that an update comes from the same publisher, but Apple has not scanned it. If macOS says Loupist is damaged, delete the download, fetch it again and verify it. Do not work around that message.
Verify your download
Compare the checksum with SHA256SUMS from the same release, then confirm that GitHub built this exact file from the public release workflow.