macOS – What is the Dollar Sign ($) Icon in Menu Bar?

If a menu icon is allowed to move, command + mouse select will work.

You might have to patch the program (or System Ui Server). Have you asked the developer if they can implement this as a feature?

Only the Apple icons are movable on my 10.6.7 systems so it certainly isn't easy for a developer to get this working and may be impossible in practice.

The only workaround would be to have a script that delays the radium start as the leftmost item is the last to load. If you had a launch script that slept for 3 minutes and then killed, relaunched that app - it would be leftmost until another started... If it was really important, you could kill and relaunch it periodically every X minutes to ensure that over time it's the leftmost icon without you taking manual action.

It's likely the Finder's application icon is corrupted.

To check, navigate to /System/Library/CoreServices/ and select Finder.app. Get information on the file and see what the icon looks like.

I'm not sure where you can get a replacement icon (maybe another computer or the install disks with some package exploration). I'd post mine here but for Apple's remarkably strict copyright lawyers.

--SOLUTION--

Navigate to ~/Library/Preferences and move the com.apple.dock.plist file to your desktop. This may result in your dock items needing to be reloaded. Logout and back in.