If you want to install a beta version of macOS, either for software development or for simply poking around, the smartest way to do it is to partition your Mac’s hard drive. That will create a new storage area just for the different installation, with entirely separate data, so none of your precious documents are at risk.
You also might want to have different versions of macOS on hand for testing old versions of the operating system, too. It’s easier than keeping a pile of aging Macs around (my go-to strategy).
Luckily, the Mac comes with a very handy tool to partition your hard drive for free. Read on to find out how to partition your Mac’s hard drive with Disk Utility.
How to partition your Mac hard drive to run multiple versions of macOS
Image: D. Griffin Jones/Cult of Mac
January 26, 2016: After nine years of spectacular growth, iPhone sales flatline for the first time. Some observers say the sales plateau means that “peak iPhone” has finally arrived.
January 25, 1996: Rumors circulate that Sun Microsystems is in talks to acquire Apple.
January 24, 1984: Apple ships its first Mac, the mighty Macintosh 128K.
January 23, 1985: Apple introduces The Macintosh Office, a combination of hardware and software that represents the company’s first real attempt at cracking the business market dominated by IBM.
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January 22, 1984: Apple’s stunning “1984” commercial for the original Mac airs on CBS during the third quarter of Super Bowl XVIII. Its dystopian theme and epic visuals pitch the Macintosh 128K as a revolutionary computer coming to smash the status quo.