If you have a Mac with a hard-disk drive or hybrid Fusion drive, you will stay on HFS+.Īnd a note of caution: Because High Sierra incorporates a new file system, make sure you've got a complete and current backup of the contents of your storage device before upgrading to High Sierra in case the upgrade goes south. And because the new file system is designed for SSDs, the system and apps should feel more responsive.īe aware that just Macs with SSD drives will get the new file system. The Mac's new file system will also focus on privacy and security, Apple said, and embrace full disk encryption.

Apple File System is tailored for flash storage and solid state drives and replaces HFS+, the hard-disk-drive file system Apple rolled out in 1998. Called Apple File System, MacOS's new file system is now used across all Apple platforms - from the Apple Watch and Apple TV to the iPhone and Macs - to organize storage. Prosįlashy file system: With High Sierra, Apple switches to a new file system for MacOS flash storage. High Sierra might disappoint those looking for whizzy new features, but Apple's focus on core improvements will make for a more responsive and more secure OS. Apple's MacOS High Sierra update offers lots of behind-the-scenes changes that should make the Apple's desktop OS easy to use.