Hello.
Basically our plugins are compatible up to OSX 10.8.5.
But you can still try to clear logic cache to rescan the Audio Units.
1/ Quit Logic
2/ Delete the following files:
[username]/Library/Caches/com.apple.audiounits.cache
[username]/Library/Caches/AudioUnitCache/com.apple.audiounits.cache
[username]/Library/Caches/AudioUnitCache/com.apple.audiounits.sandboxed.cache
Note: only 1 of these files might exist, delete all that you find.
You will need to hold down Alt and select Go -> Library to view the User Library.
3/ Open Logic & give it a try !
Best
Edouard