Audacity Application Crash.
iMac 27 inch, Mid 2011
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXEC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00007ffee843ff98
Exception Note: EXC_CORPSE_NOTIFY
Terminaiton Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Termination Process: exc handler 
Start Audacity, launch a window with “File->New”, launch a second window with “File->New”
Iconify one of the windows, click the yellow button in the upper left corner.
Bring that iconified window back too the desktop, Crash.
I have reported this crash several times to Apple. I don’t know when (if ever) you will see those reports.
Audacity 2.3.2 does not show this defect.