FAQ.How to get the cursor blink interval time?
Feedback.

Answer: On Mac OS you can use GetCaretTime from the toolbox.
Example:

#if TargetMacOS
  #if TargetCarbon
    declare function GetCaretTime lib "CarbonLib" () as integer
  #else
    declare function GetCaretTime lib "InterfaceLib" () as integer
  #ENDIF
  
  MsgBox str(GetCaretTime())+" ticks"
#endif

Notes: 60 ticks make one second.