I feel like an idiot! I've tried to find answer for over an hour w/o any success.
I'm using: Mac OS 12.1 and Excel for Mac 16.56

Should be simple...
My file is just one single sheet "Sheet 1"
Cells A1 => L53 contain all content.
I want to "Protect / Lock" all cells except: D29, D30, D31, and D32.

Desired End Result: Folks using protected sheet can "what if" by changing values in D29, D30, D31, and D32 but these are the only cells where cell value/formula can be altered.

Thanks,
_Andy L