If you have a lot of small Outlook PST files or you want to merge them into one, I suggest you use the best tool that helps you merge all smaller PST files into one. You can use ToolsCrunch MAC Merge PST Tool. With the help of this application, you can easily merge Outlook PST files into One by following a few simple steps. Also, you don’t need any technical expertise to utilize this program on your computer system. All MS Windows editions and Mac variants are compatible with this software, so both Mac and Windows users use this application. To learn more, download the free demo version of this program.