I received my invite about an hour or two ago.
Downloaded the Mac version, unzipped opened…Mac error window.
I’m going to try and isolate to see if that helps, but didn’t know if anyone else has experienced this and thought I should report it.
Code Type: X86-64 (Native)
Parent Process: launchd 
OS Version: Mac OS X 10.7.5 (11G63)
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x00007fff5fc01028