To open RAR files, you can use WinRAR, which is the software made by the company that invented RAR technology. To open .001 files, you need another program, such as HJSplit, 7-Zip or File Joiner.

If you chose "Shell Integration" when installing WinRAR, right-click the first RAR file and select "Extract Here." Doing so quickly extracts files to the same folder containing the RAR parts.

When you open a RAR file on your Mac, it will turn into a folder where you can access all of the decompressed files. Visit Business Insider's homepage for more stories.

However, Windows has not natively supported RAR files since its release. This meant that users who wanted to open RAR files had to install third-party apps like WinRAR.

An Android mobile device is somewhat like a highly portable computer. As with computers, your Android phone and tablet can open rar files. Here's how to do it.