Osx illegal instruction

Illegal instruction in user_clock.F90. I'm having trouble compiling OpenIFS for OSX, specifically with the optimizations enabled. - running BG2:EE as purchased from the mac app store - running os x mavericks on two machines - downloaded the BG2 Tweaks Pack v14 to both machines - tweaks run setup-bg2_tweaks on the other machine, and the install bombed with 'illegal instruction: 4' error. Illegal instructions normally happen when you try to run compiled code from one CPU (sub)architecture to another. Even the so-called sub-architectures can produce these problems (i.e: code compiled with an AMD Bulldozer with AVX instructions/optimizations