I have precisely the same problem with Steam on Mac - it crashes at the start of Somewhere Under the Sea.
Process: drod [647]
...
Crashed Thread: 0 MainThrd Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000058
I'm not a coder any more (*cough* for 30 years) but it looks as if it comes down to a call to make tiles dark...
Any chance of fixing it -- can't go further. Have replayed to this point with same outcome.
Also a loyal Droder for years...
thanks!
Poodle