Disk Utility User Guide

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A MAC file contains a macro, which may be created by various programs, such as UltraEdit, Minitab, and Cabrilog Cabri Geometry II.It contains a list of commands in plain text that are used to perform functions in the respective application. MAC files can be opened by the programs that created them. Show or hide filename extensions on Mac. A filename extension appears at the end of some filenames, and looks like a period followed by a few letters or words (for example,.jpg). A file’s filename extension shows what type of file it is and what apps can open it. Filename extensions are usually hidden in macOS, but if you find them useful.

Disk Utility on Mac supports several file system formats:

  • Apple File System (APFS): The file system used by macOS 10.13 or later.

  • Editor for php mac os. Mac OS Extended: The file system used by macOS 10.12 or earlier.

  • MS-DOS (FAT) and ExFAT: File systems that are compatible with Windows.

Apple File System (APFS)

Apple File System (APFS), the default file system for Mac computers using macOS 10.13 or later, features strong encryption, space sharing, snapshots, fast directory sizing, and improved file system fundamentals. While APFS is optimized for the Flash/SSD storage used in recent Mac computers, it can also be used with older systems with traditional hard disk drives (HDD) and external, direct-attached storage. macOS 10.13 or later supports APFS for both bootable and data volumes.

APFS allocates disk space within a container on demand. The disk’s free space is shared and can be allocated to any of the individual volumes in the container as needed. If desired, you can specify reserve and quota sizes for each volume. Each volume uses only part of the overall container, so the available space is the total size of the container, minus the size of all the volumes in the container.

Choose one of the following APFS formats for Mac computers using macOS 10.13 or later.

  • APFS: Uses the APFS format.

  • APFS (Encrypted): Uses the APFS format and encrypts the volume.

  • APFS (Case-sensitive): Uses the APFS 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 APFS format, is case-sensitive to file and folder names, and encrypts the volume. For example, folders named “Homework” and “HOMEWORK” are two different folders.

You can easily add or delete volumes in APFS containers. Each volume within an APFS container can have its own APFS format—APFS, APFS (Encrypted), APFS (Case-sensitive), or APFS (Case-sensitive, Encrypted).

Mac OS Extended

Choose one of the following Mac OS Extended file system formats for compatibility with Mac computers using macOS 10.12 or earlier.

  • 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 folder names. For example, folders named “Homework” and “HOMEWORK” are two different folders.

  • Mac OS Extended (Case-sensitive, Journaled, Encrypted): Uses the Mac format, is case-sensitive to folder names, requires a password, and encrypts the partition.

Windows-compatible formats

Choose one of the following Windows-compatible file system formats if you are formatting a disk to use with Windows.

  • MS-DOS (FAT): Use for Windows volumes that are 32 GB or less.

  • ExFAT: Use for Windows volumes that are over 32 GB.

See alsoPartition schemes available in Disk Utility on MacAbout Disk Utility on Mac
It is usually possible to find a working cross-platform solution. First of all, as you have noticed, programs that exist for both Mac and PC are essentially unproblematic (the file format is typically the same, or the programs have built-in conversion facilities). For other programs, study the Save As dialogue box for each PC application. Compare the available file formats to the ones listed under the Open dialogue in a similar Mac program. Try to find a common denominator. Often, generic formats (such as Text, RTF, SYLK) can be used.
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Different File Extensions For Mac

Jan 10, 2007 1:33 PM

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