Install it
- Download Amnis from the official download page.
- Open the `.dmg` file.
- Drag Amnis into Applications.

Open it for the first time
Launch Amnis from Applications, not from the download window.
Keep the app open while the first setup finishes.
If it does not open
- Make sure the app is in Applications.
- Quit it fully, then open it again.
- If you kept an older copy, remove it and retry from the newest download.