Excel says macros aren't enabled but they are....

Did you:

Go To File- options - trust center -trust center settings - macro settings ,
the second option down (disable all macros with notification)?

You may have to Repair your office - but:

Can you post your file?

Attach a sample workbook. Make sure there is just enough data to demonstrate your need. Include a BEFORE sheet and an AFTER sheet in the workbook if needed to show the process you're trying to complete or automate. Make sure your desired results are shown, mock them up manually if necessary.

Remember to desensitize the data.

Click on GO ADVANCED and use the paperclip icon to open the upload window.

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Hi AreJay,

I moved your code from the worksheet to a module and that message doesn't come up anymore - unfortunately the code is still not working because the Application.Caller throws Error 2023

I also changed this:

Sub MakeCheckBoxes() 'Run once to make checkboxes
    Dim cItem As Range
    Dim C As Range
    
    Worksheets(sMasterSheetName).CheckBoxes.Delete
    
    With Worksheets(sMasterSheetName)
        For Each cItem In .Range("C2", .Cells(Rows.Count, 3).End(xlUp))
            If Not cItem.Interior.ColorIndex > 0 Then
                Set C = cItem.Offset(0, 3)
                With .CheckBoxes.Add(C.Left, C.Top, C.Width, C.Height)
                    .Caption = ""
                    .Value = True
                    .Name = cItem.Text
                     .OnAction = "CheckBoxClick"
                End With
            End If
        Next cItem
    End With
End Sub

*Would you be OK with ActiveX checkboxes instead?