Users that upgraded to Mac OSX 10.8 or who recently got a new Mac will probably get a nasty message that won’t let them run FrostWire.
If you see that dialog on your Mac, it’s an EVIL LIE. The App is not “damaged”, we’re not sure why Apple would lie in such a way to users instead of just letting them know that this app didn’t come from their “App Store”.
Basically the geniuses at Apple decided to impose a new setting to not let you run software that doesn’t come from their App Store (next thing we know we won’t be able to run software that doesn’t come from the App Store just like on iOS (iPhones/iPads) and people will have to jail break their desktop/laptops…*sigh*)
To solve the issue, on your mac, go to:
System Preferences > Security & Privacy
and tell your Mac to open apps downloaded from everywhere, like you’ve been doing for the last… well since Macs were macs.
Let’s hope Apple won’t start forcing every app out there to be inside their App Store and then impose draconian rules to enter the App Store, this will be the beginning of the end of Mac OSX if it happens, please let users run the software they’ve downloaded on their computers.
Official FrostWire Blog 
My question to the developers of Frostwire, is this, why not become a identified developer?
we’re in the process of. hopefully we’ll be able to reuse the same certificate we have for our windows app, this process is not cheap.
Thank you for the info. Shitty dictorion behavior
My Frostwire is working just fine.
mine isn’t letting me download anything! it’s all of a sudden too, I need help!!
If you want to maintain your security:
1. Temporarily allow all apps to be opened from anywhere.
2. Open Frostwire
3. Close Frostwire (may not be required but just to be safe)
4. Restore your security settings to their original value (Mac App Store and identified developers)
5. Good to go (Frostwire is now a trusted app and your security is back….double win)
mines still isn’t working even after fixed my settings