Is Your Excel 32-Bit Or 64-Bit?
If you are unsure about which version of Excel you have on your computer, here are some suggestions.
for Office 2013 & 2016:
Start a Microsoft Office program (Word, Excel, Outlook, etc.).
Click the File tab in the ribbon.
Then click Account
On the right, you should see an About button ("About Excel").
For Office 2010:
Click Help in the left column
From here, you'll see About (Microsoft Excel)
Finally you'll see Version showing you what version you are running
For Excel 2003 - Excel 2007
The following steps will walk you though finding what version of Office you have installed on OSX
Open your Office Software (Word, Excel, PowerPoint)
Note: We will use word in this example
Click on the Word on the Menu Bar
From here, click on About Word