I am very late to the discussion on the issue of SEENV2 not opening on Mac. The developer forgot to mark the actual app file as "executable".
To fix this, locate your SEEVN 2 Pro.app in your Finder (probably /Applications). Right click on the app file and click "Show Package Contents".
- Go into the "Contents" folder, then go into the "MacOS" folder.
- Open the Terminal app (/Applications/Utilities/Terminal.app).
- In Terminal, we have to make the "SEEVN_v2_7_MacOS" file executable.
- To do this, type (no quotes!) "chmod 755 " notice the space there, then type SEE (app caps) and press the Tab key to autocomplete the file name. Press Enter.
- The "SEEVN_v2_7_MacOS" file should change from a white document icon to a black window icon with "exec" in green text.
- Now start SEEVN 2 Pro as normal.
- You may get a warning about the developer being unknown, click Cancel.
- Then open System Preferences / Settings, go to the Security tab.
- You should see a warning about an unknown developer app. Click "Open Anyway".
- Confirm any "are you sure?" type warnings, and the app should open for you now going forward.