SmartScreen or Gatekeeper warns about the installer
XDM isn’t signed with a paid commercial certificate, so Windows SmartScreen and macOS Gatekeeper ask for confirmation the first time:
- Windows: More info → Run anyway.
- macOS: System Settings → Privacy & Security → Open Anyway.
Only do this for installers from this site or the official GitHub releases.
Firewall asks whether XDM may access the network
Allow it, at least for private networks. XDM needs internet access to download, and a local
connection (127.0.0.1:8597) to talk to the browser extension.
Downloads fail only with XDM, not in the browser
- HTTPS scanning / SSL inspection in some antivirus suites interferes with apps that check certificates. You’ll see a TLS connection error. Exclude XDM from HTTPS scanning.
- Web shields may block local connections, which breaks the extension. Exclude
127.0.0.1. - Controlled folder access (Windows ransomware protection) blocks writing to protected folders. Allow XDM, or choose a different download folder.
A finished file was deleted or quarantined
That was your antivirus acting on the downloaded file, not XDM. Check the antivirus’s quarantine log. If you trust the file’s source, restore it from there. To scan every download automatically, see after-download actions.