Hi MikeGoldenberg1,
I go through your post carefully and as per your description, I just tested form my side Excel version 16.46 (21021202) on Mac OS Big Sure and when to used Find & Replace option, it worked as expected.
I select range of cell with some empty cell and some cells have data in Excel for mac, click on Find & Replace option>replace>under Find what box I leave empty and under Replace with I type e.g. “zzz” and I click on Replace all button it will replay all empty cell to zzz, here’s the result.
For you reference: Find and replace text or numbers in Excel for Mac
As are getting the issue replacing searched content with blank, I would like to collect following information to troubleshoot the issue:
1.Could you please confirm the build and version of your Excel apps? To get this information, open Excel, go to the Excel menu and choose About Excel.
2.For the test purpose, create a new workbook, enter some data and check if you can replace content in a blank cell.
3.Please provide related screenshot showing the exact issue.
I appreciate your patience and understanding.
Best Regards
Waqas Muhammad