I just pulled the OS X beta down yesterday, 7/16/2015, the setup application's info said it was version 6.1.0.00031 and it almost worked perfectly! All I had to do was install one missing library file rts430xl.lib into /Applications/Texas-Instruments/ccsv6/tools/compiler/ti-cgt-msp430_4.4.3/lib/rts430xl.lib and everything is working!
Thanx!