Summary
Encrypting HFS+ formatted volumes on macOS High Sierra can be done by right-clicking the volume in the Finder and choosing the option to encrypt it.
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This is because macOS High Sierra supports Apple File System (APFS) as the default file system for solid state drives and flash memory
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, as well as other Windows-compatible formats such as MS-DOS (FAT) and ExFAT.
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However, encrypting the volume will create a new APFS container with an encrypted volume, partitioning the drive between HFS+ and APFS.
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HFS+ (also known as Mac OS Extended or HFS Extended) is a journaling file system developed by Apple Inc. and is one of the formats supported by the iPod digital music player.
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According to
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Summary
APFS (Apple File System) is the default file system for solid state drives and flash memory in 2017's macOS High Sierra, offering many benefits over Mac OS Extended (Mac OS Extended). Mac OS Extended is the best option for mechanical and hybrid hard drives, while ExFAT (ExFAT) is best for external drives shared with Windows computers. Case sensitivity should be avoided unless you know why you want it, as it is not a particularly optimized file system.
What’s the Difference Between APFS, Mac OS Extended (HFS+), and ExFAT?
howtogeek.com
Summary
Disk Utility on Mac supports several file system formats, including Apple File System (APFS), Mac OS Extended, MS-DOS (FAT), and ExFAT, which are compatible with Windows. APFS is optimized for the Flash/SSD storage used in recent Mac computers, but can also be used with older systems with traditional hard disk drives and external, direct-attached storage. Users can choose one of the APFS formats for Mac computers using macOS 10.13 or later, or one of the Windows-compatible formats, such as MS-DOS (FAT) and ExFAT.
File system formats available in Disk Utility on Mac
apple.com
Summary
Disk Utility does not even list Mac OS Extended with encryption as an option any longer and the other way to do this so far – right-clicking the volume and clicking encrypt – also just creates a new APFS container with encrypted volume, partitioning your drive between HFS+ and APFS.
Big Sur & External Drives (APFS, HFS+, Quotas, Reserves, Disk ... - reddit
reddit.com
