Trojan:OSX/Loosemaque.A appears to be a video game, but deletes files from the user home folder when a user plays it.
The F-Secure security product will automatically remove the file.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note You need administrative rights to change the settings.
This malware is notable not only for being one of a relatively small handful of malware on one of the Macintosh platforms, it is also the only such trojan so far to use a game as its payload.
It is also unusual in that its developer specifically states its actions on the website where it is available, as well as on the splash screen of the game itself:
Trojan creates a folder containing game content, with the name lose lose folder.
On execution, users are able to play a Space Invaders look-a-like game (see screenshot below). When the user shoots an enemy character however, a file or folder in the user's home directory will be deleted.
If the user character is destroyed, the game ends. The Trojan subsequently sends the user's score to a remote server and deletes itself from the compromised computer.