Macx video converter pro high sierra10/21/2023 ![]() Use startosinstall: macOS High Sierra includes a command line tool hidden away within the installer that can be used to control the conversion to APFS. You could use Disk Utility’s Restore feature to create your clone as well. ![]() Carbon Copy Cloner and SuperDuper are two popular apps for creating clones. Once the upgrade is complete, you can clone the external drive back to your normal internal startup drive. This will allow you to retain the current formatting on the external. Use an external drive: You can choose an external drive as the target for the macOS High Sierra upgrade. There are a couple of strategies you can use to prevent the upgrade to APFS and retain the older HFS+ formatting: How to Prevent Automatic Conversion to APFS However, this could change with the next update to macOS High Sierra, as it seems Apple is committed to growing APFS usage across all Apple devices.Īlthough the conversion to APFS will happen automatically if your Mac startup drive meets the criteria, specifically, an SSD occupying a connection internally to your Mac, you can choose not to use APFS and force the installation to bypass the conversion process, leaving your startup drive in the older HFS+ format. External SSDs being used as startup drives seem to be left with their original file system, with no conversion to APFS occurring. At the time of this writing, the automatic conversion process is limited to internal SSDs. The conversion process leaves the drive’s data intact, or at least it’s supposed to be sure you have a recent backup before upgrading, just in case. APFS replaces HFS+ (Hierarchical File System Plus), and offers a new, modern file system that is optimized for use with SSDs (Solid State Drives), while still being usable on hard drives and, in the near future, even on tiered storage systems such as Apple’s Fusion drive.Īs part of the upgrade process, the macOS High Sierra installer will automatically convert an SSD to the new APFS. MacOS High Sierra brings with it a new filing system known as APFS (Apple File System).
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