Our tutorial below will show you how to change the default file save format in Excel for Mac. If you create these types of files frequently and would prefer to have Excel save in that file format by default, then you can change that setting. This is the current default file format for Excel on Windows computers and in the online version of Excel, meaning that your Excel for Mac file can be opened by people using those versions, too.īut sometimes files that you create in Excel will need to be used in other programs. When you use Excel for Mac on your Macbook, files that you create and save will be saved in the.