Pro Tools Installation Issue

I'm new to Pro Tools (started recording with Sonar X2). I've been going through the process of installing Pro Tools and now that I'm finally at the actual downloading/installation part, I'm being told that my OS is not up to date even though it's the most recent update and Pro Tools says the OS needs to be 10.7 or above and I have OS X Yosemite 10.10.2. Any ideas on what could be causing the error?