Hi Ideslin,
What version of the Mac OS are you running?
Is that the entire error?
It might be related to newer security settings for the Mac, this is for a different product but if that was the cause this solution would apply/work for Adobe products too.
http://avid.force.com/pkb/articles/en_US/Troubleshooting/Gatekeeper-blocking-installer
You can switch it back to what it was originally after the installation finishes.
- Dave