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- What Format Does Mac Os X 10.2.1 Use For Photos On Computer
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You no longer see any reason to use other apps beyond Video Converter and VLC in terms of avoiding and overcoming the Mac playback issue that irritates so many users. While VLC media player gives you ability to view anything including AVCHD files on Mac without a problem, Video Converter do much more than VLC to make your files flexible on Mac. 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. Hence, unless you want to transfer the files from Windows to Mac, it is advised to not use these formats on Mac. Here are some other tips related to formatting Mac that will come in handy: The Erase option in the Disk Utility with OS X El Capitan and later performs formatting of a drive and erasing of volume under the same name. Jun 01, 2020 The version of macOS offered by macOS Recovery might vary in some cases: If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available. If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might.
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Disk Utility User Guide
Disk Utility on Mac supports several file system formats:
- Apple File System (APFS): The file system used by macOS 10.13 or later.
- 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
Filename extension | |
---|---|
Type code | icns |
Uniform Type Identifier (UTI) | com.apple.icns |
Developed by | Apple Inc. |
Type of format |
The Apple Icon Image format is the icon format used in Apple Inc.'s macOS. It supports icons of 16 × 16, 32 × 32, 48 × 48, 128 × 128, 256 × 256, 512 × 512 points at 1x and 2x scale, with both 1- and 8-bitalpha channels and multiple image states (example: open and closed folders). The fixed-size icons can be scaled by the operating system and displayed at any intermediate size.
File structure[edit]
The file format consists of an 8 byte header, followed by any number of icons.
Header[edit]
Offset | Size | Purpose |
---|---|---|
0 | 4 | Magic literal, must be 'icns' (0x69, 0x63, 0x6e, 0x73) |
4 | 4 | Length of file, in bytes, msb first |
Icon data[edit]
Offset | Size | Purpose |
---|---|---|
0 | 4 | Icon type, see OSType below. |
4 | 4 | Length of data, in bytes (including type and length), msb first |
8 | Variable | Icon data |
Compression[edit]
lead value | tail bytes | result uncompressed |
---|---|---|
0…127 | 1…128 | 1…128 bytes |
128…255 | 1 byte | 3…130 copies |
Over time the format has been improved and there is support for compression of some parts of the pixel data. The 32-bit ('is32', 'il32', 'ih32','it32') and ARGB ('ic04', 'ic05') pixel data are often compressed (per channel) with a format similar to PackBits.[1]Some sources mentioned that the OS supports both compressed or uncompressed data chunks.
The following pseudocode decompresses the data:
Example:
02 01 02 02 80 03 81 04 82 05
should decompress to 01 02 02 03 03 03 04 04 04 04 05 05 05 05 05
Icon types[edit]
What Format Does Mac Os X 10.2.1 Use For Photos On Computer
OSType | Length (bytes) | Size (pixels) | Supported OS Version | Description |
---|---|---|---|---|
ICON | 128 | 32 | 1.0 | 32×32 1-bit mono icon |
ICN# | 256 | 32 | 6.0 | 32×32 1-bit mono icon with 1-bit mask |
icm# | 48 | 16 | 6.0 | 16×12 1 bit mono icon with 1-bit mask |
icm4 | 96 | 16 | 7.0 | 16×12 4 bit icon |
icm8 | 192 | 16 | 7.0 | 16×12 8 bit icon |
ics# | 64 (32 img + 32 mask) | 16 | 6.0 | 16×16 1-bit mask |
ics4 | 128 | 16 | 7.0 | 16×16 4-bit icon |
ics8 | 256 | 16 | 7.0 | 16x16 8 bit icon |
is32 | varies (768) | 16 | 8.5 | 16×16 24-bit icon |
s8mk | 256 | 16 | 8.5 | 16x16 8-bit mask |
icl4 | 512 | 32 | 7.0 | 32×32 4-bit icon |
icl8 | 1,024 | 32 | 7.0 | 32×32 8-bit icon |
il32 | varies (3,072) | 32 | 8.5 | 32x32 24-bit icon |
l8mk | 1,024 | 32 | 8.5 | 32×32 8-bit mask |
ich# | 288 | 48 | 8.5 | 48×48 1-bit mask |
ich4 | 1,152 | 48 | 8.5 | 48×48 4-bit icon |
ich8 | 2,304 | 48 | 8.5 | 48×48 8-bit icon |
ih32 | varies (6,912) | 48 | 8.5 | 48×48 24-bit icon |
h8mk | 2,304 | 48 | 8.5 | 48×48 8-bit mask |
it32 | varies (49,152) | 128 | 10.0 | 128×128 24-bit icon |
t8mk | 16,384 | 128 | 10.0 | 128×128 8-bit mask |
icp4 | varies | 16 | 10.7 | 16x16 icon in JPEG 2000 or PNG format |
icp5 | varies | 32 | 10.7 | 32x32 icon in JPEG 2000 or PNG format |
icp6 | varies | 64 | 10.7 | 64x64 icon in JPEG 2000 or PNG format |
ic07 | varies | 128 | 10.7 | 128x128 icon in JPEG 2000 or PNG format |
ic08 | varies | 256 | 10.5 | 256×256 icon in JPEG 2000 or PNG format |
ic09 | varies | 512 | 10.5 | 512×512 icon in JPEG 2000 or PNG format |
ic10 | varies | 1024 | 10.7 | 1024×1024 in 10.7 (or 512x512@2x 'retina' in 10.8) icon in JPEG 2000 or PNG format |
ic11 | varies | 32 | 10.8 | 16x16@2x 'retina' icon in JPEG 2000 or PNG format |
ic12 | varies | 64 | 10.8 | 32x32@2x 'retina' icon in JPEG 2000 or PNG format |
ic13 | varies | 256 | 10.8 | 128x128@2x 'retina' icon in JPEG 2000 or PNG format |
ic14 | varies | 512 | 10.8 | 256x256@2x 'retina' icon in JPEG 2000 or PNG format |
ic04 | varies | 16 | 16x16 ARGB | |
ic05 | varies | 32 | 32x32 ARGB | |
icsB | varies | 36 | 36x36 | |
icsb | varies | 18 | 18x18 |
- the values inside the brackets () in the length column is the uncompressed length.
- the ARGB format consists of the ascii values for 'ARGB' and the four compressed channels tightly packed
Other types[edit]
OSType | Length (bytes) | Description |
---|---|---|
'TOC ' | varies | 'Table of Contents' a list of all image types in the file, and their sizes (added in Mac OS X 10.7) |
'icnV' | 4 | 4-byte big endian float - equal to the bundle version number of Icon Composer.app that created to icon |
'name' | Unknown | |
'info' | 259 | Info binary plist. Usage unknown |
Support[edit]
Various image viewers can load *.icns files, and free and open source converters from or to PNG also exist.[2][3]GTK+ can load *.icns resources since 2007.[4] Other tools supporting the format include the Apple Icon Composer and icns Browser, The Iconfactory, and IconBuilder.
MacOS[clarification needed] offers the built-in
MacOS[clarification needed] offers the built-in
iconutil
command line tool to pack and unpack *.icns files.External links[edit]
Mac Os X 10.7 Download Free
- IconFamily – Open source Objective C class to read and write Apple icns files
- osxiconutils - Command line tools to work with Apple icns files
See also[edit]
Mac Os X 10.11 Download Free
- ICO format on Windows
- X PixMap format for X11
References[edit]
- ^Macintosh Icons
- ^'libicns'. SourceForge project icns. 2009. Retrieved August 18, 2016.
- ^'png2icns'. Moin Uddin. 2016. Retrieved May 25, 2017.
- ^Lyonel Vincent (2007). 'Mac OS X icons for GTK+'. Retrieved August 18, 2016.
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