Feb 17, 2017 - Eject the USB drive before removing it from the Mac. Format as OS X Extended (Journaled) and select Scheme as GUID Partition Map. For example, if you want to change the partition map of a USB, Thunderbolt, or other storage device from Master Boot Record to GUID Partition Map. If you simply want to erase a volume, see Erase a volume. Important: As a precaution, it’s best to before creating new partitions on your device. • In the Disk Utility app on your Mac, choose View > Show All Devices. • Select an existing APFS volume in the sidebar, then click the Add Volume button. • Enter a name for the new APFS volume. • Click the Format pop-up menu, then choose a format. • APFS: Uses the Apple File System format, recommended for volumes using macOS 10.13 or later. • APFS (Encrypted): Uses the Apple File System format and encrypts the partition. ![]() • APFS (Case-sensitive): Uses the Apple File System format and is case-sensitive to file and folder names. For example, folders named “Homework” and “HOMEWORK” are two different folders. • APFS (Case-sensitive, Encrypted): Uses the Apple File System format, is case-sensitive to file and folder names, and encrypts the partition. For example, folders named “Homework” and “HOMEWORK” are two different folders. • If you want to manually manage APFS volume allocation, click Size Options and enter values in the fields: • Reserve Size: The optional reserve size ensures that the amount of storage will remain available for this volume. • Quota Size: The optional quota size limits how much storage the volume can allocate. When you’re done, click OK. Important: As a precaution, it’s best to before creating new partitions on your device. • In the Disk Utility app on your Mac, choose View > Show All Devices. • Select the device in the sidebar, then click the Partition button. Internal storage devices appear below the Internal section in the sidebar. External devices appear below the External section in the sidebar. When you select a volume that already has data on it, the pie chart shows a shaded area representing the amount of data on the volume and an unshaded area representing the amount of free space available for another volume. Disk Utility also reports whether the volume can be removed or resized. Does rufus work for mac. If you see a small volume with an asterisk, the partition is smaller than can be represented at the correct scale in the chart. • For each volume, click the Format pop-up menu, then choose a format. • APFS: Uses the Apple File System format, recommended for volumes using macOS 10.13 or later. • APFS (Encrypted): Uses the Apple File System format and encrypts the partition. • APFS (Case-sensitive): Uses the Apple File System format and is case-sensitive to file and folder names. For example, folders named “Homework” and “HOMEWORK” are two different folders. • APFS (Case-sensitive, Encrypted): Uses the Apple File System format, is case-sensitive to file and folder names, and encrypts the partition. For example, folders named “Homework” and “HOMEWORK” are two different folders. • Mac OS Extended (Journaled): Uses the Mac format (Journaled HFS Plus) to protect the integrity of the hierarchical file system. • Mac OS Extended (Journaled, Encrypted): Uses the Mac format, requires a password, and encrypts the partition. • Mac OS Extended (Case-sensitive, Journaled): Uses the Mac format and is case-sensitive to file and folder names. For example, folders named “Homework” and “HOMEWORK” are two different folders.
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