Apple Disk Image
From Just Solve the File Format Problem
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Dan Tobias (Talk | contribs) m (Dan Tobias moved page 2MG to Apple Disk Image: Appears to be a variant of this general format) |
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|formattype=electronic | |formattype=electronic | ||
|subcat=Disk Image Formats | |subcat=Disk Image Formats | ||
| − | |extensions={{ext|2mg}} | + | |extensions={{ext|dmg}}, {{ext|smi}}, {{ext|img}}, {{ext|2mg}} |
}} | }} | ||
| − | The ''' | + | The '''Apple Disk Image''' format is a MacOS, OS X, and Apple II disk image format family (which may be stored in [[DSK (Apple II)]] or [[nibblized disk image]] format) preceded by a prefix giving format information, and often a trailer with comments and other metadata. The prefix begins with the bytes corresponding to the [[ASCII]] string "2IMG" (though reversed in order due to their being [[Endianness|little-endian]]). The trailer usually has the ASCII string "koly" at the start of it. |
| + | |||
| + | Usually the extension .dmg is used for current OS X images, but .smi (Self-Mounting Image) and .img are also used (mostly for old MacOS disks), and .2mg was used for Apple II series disks (which can come in DOS 3.3 or ProDOS sector order). | ||
== Links == | == Links == | ||
| − | * [http://apple2.org.za/gswv/a2zine/Docs/DiskImage_2MG_Info.txt Format documentation] | + | * [[Wikipedia:Apple Disk Image|Wikipedia article]] |
| + | * [http://newosxbook.com/DMG.html Format discussion] | ||
| + | * [http://apple2.org.za/gswv/a2zine/Docs/DiskImage_2MG_Info.txt 2MG Format documentation] | ||
* [http://apple2.org.za/gswv/a2zine/faqs/Csa2FLUTILS.html#006 What are DSK, NIB, 2MG, HDV,... disk image files & how do I use them?] | * [http://apple2.org.za/gswv/a2zine/faqs/Csa2FLUTILS.html#006 What are DSK, NIB, 2MG, HDV,... disk image files & how do I use them?] | ||
Revision as of 23:59, 26 March 2013
The Apple Disk Image format is a MacOS, OS X, and Apple II disk image format family (which may be stored in DSK (Apple II) or nibblized disk image format) preceded by a prefix giving format information, and often a trailer with comments and other metadata. The prefix begins with the bytes corresponding to the ASCII string "2IMG" (though reversed in order due to their being little-endian). The trailer usually has the ASCII string "koly" at the start of it.
Usually the extension .dmg is used for current OS X images, but .smi (Self-Mounting Image) and .img are also used (mostly for old MacOS disks), and .2mg was used for Apple II series disks (which can come in DOS 3.3 or ProDOS sector order).
