Unable to make plugins I generate, show up on friends system.

Hello all,

I'm starting out designing After Effects Plugins and haveing some success designing them and working with them on my system, but when i send them to my friend, he can't seem to successfuly install them and get them to appear.

Details:

My system:

OSX v.10.9.1

After Effects CS5 10.0.0.458

XCode v.5.0.2

His System:

OSX v.10.8.5

After Effects CS5 10.0.0

All of my plugins are based on Skeleton, from the SDK Templates, so to test out this incompatibility I compiled Skeleton without changing any code and that plugin won't show up. The only thing I had to adjust to get it to compile on my system is the target base SDK, which I set to OS X 10.8, as this seemed like to best way to make it compaitible with my friends system which is still at 10.8 vs mine at 10.9.

The plugins I produce, I put them in my plugin directory and they show up fine, and when my friend does the same, nothing...

What could we be missing?

Thanks in advance...