“If you’ve always wanted to partition your Mac’s hard drive so you can run a separate operating system — including macOS High Sierra — in tandem with your current one, it’s surprisingly easy to do so thanks to Apple’s built-in disk utility program,” Serenity Caldwell and Lory Gil write for iMore.
“Partitioning your Mac is basically splitting your hard drive into separate, usable systems,” Caldwell and Gil write. “It makes it possible to run two separate operating systems on one device, like Windows and macOS, and even macOS betas.”
“The most important thing to do before making any changes to your hard drive is to back it up,” Caldwell and Gil write. “Second, make sure you have enough free disk space to properly run a secondary operating system. Shoot for at least 30GB free, though we recommend closer to 50GB if you have it available.”
How to create a partition on your Mac to run multiple OSes here.
MacDailyNews Take: This is an excellent way to run beta software and operating systems if you don’t have a dedicated test Mac!
I always ask myself if I should trust Windows, even if it’s installed on a separate partition (Boot Camp), not to spy on my macOS partition. Would it be technically possible for Windows to do this? Thanks.
You give Windows too much credit!
What about 4K iMac with hard drive disc + Flash Drive combo?
Does this effect Flash Drive responsiveness?
What about the 4K iMac with Disc hard drive + Flash drive combo?
Does partitioning effect the responsiveness of Flash Drive?
I have done that but 50gb is still not enough. If planning for future size increases need to go 100gb at least. When I needed more room, a major headache to get everything done right.