To do Alt + M K K on Mac in Excel, download and install Accelerator Keys, then press Option, followed by M, K, K.
Command: Error Checking
This is how to do Alt + M K K on Mac in Excel with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with Excel.
Alt + M K K runs the Error Checking dialog in Excel. This scans your worksheet for potential formula errors like #VALUE!, #REF!, #DIV/0!, and other issues. It presents each error one at a time and offers options to fix, ignore, or get help with each error.