For what it's worth, I am using Pro Tools 10.3.8 with the 11R on OSX 10.9.4 with no issues.

What types of issues are you running into when you install the 11R driver?
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Jackson SL2H (SH-1, TB-5)
Jackson SLS3 (DiMarzio Dominion set)
Jackson KEXTMG (EMG-60, EMG-81)
PRS Singlecut (PRS#7, BKP Painkiller)
Schecter C-1 Stealth (SH-1, SH-6)
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