278:, but with some possible shortcomings: to read a Mac's HFS-formatted partitions, extra drivers such as MacDrive, TransMac, MacDisk, or HFSExplorer are necessary. Users also must ensure their computer possesses appropriate interface hardware in order to physically connect to a Mac in Target Mode. MacDrive also has a read-only option to prevent any accidental editing of the computer in Target Disk Mode; however, this mode cannot be set after an HFS/HFS+ disk is mounted. With the addition of HFS drivers into Apple's
20:
131:) allowed the original PowerBook series to attach to a desktop Mac as an external SCSI disk. A unique system control panel on the PowerBook was used to select a non-conflicting SCSI ID number from the host Mac. This also made it possible to select the disk in the Startup control panel and boot up from it.
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The host computer (the computer into which the Target Disk Mode booted computer is plugged) merely needs to meet the same requirements as for any external mass storage device using the bus in question, and (if access to native Mac formatted partitions such as the boot volume is desired) support for
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The 12-inch Retina MacBook (early 2015) has only one expansion port, a USB-C port that supports charging, external displays, and Target Disk Mode. Using Target Disk Mode on this MacBook requires a cable that supports USB 3.0 or USB 3.1, with either a USB-A or USB-C connector on one end and a USB-C
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A Mac booted in Target Mode can be attached to the port of any other computer, Mac or PC, where it will appear as an external device. Hard drives within the target Mac, for example, can be formatted or partitioned exactly like any other external drive. Some computers will also make their internal
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are also able to read and write to a Mac's HFS or HFS+ formatted devices through Target Disk Mode. It is working out-of-the-box on most distributions as HFS+ support is part of the Linux kernel. However these filesystems cannot be checked for errors, so for shrinking or moving partitions it is
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to read (but not write) HFS partitions, without the purchase of software. Users have separated these drivers from the main
Bootcamp install, and now also install on other Windows computers. Host computers running
104:; however, Thunderbolt-to-FireWire, Thunderbolt-to-Gigabit-Ethernet, and USB-3.0-to-Gigabit-Ethernet adapters are an option when one of the computers does not have FireWire or Thunderbolt.
329:
188:, FireWire Target Disk mode replaced the earlier disk mode implementation, also receiving official support beyond laptops to all subsequent Macs with built-in FireWire.
173:. However, SCSI Disk Mode can be implemented unofficially on any Macintosh with an external SCSI port by suspending the startup process with the
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264:
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146:, Apple implemented HD Target Mode, which essentially enabled SCSI Disk Mode by translating the external SCSI commands via the
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switch, as long as all internal drives on the chain can be set to different IDs than the active host system's devices.
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153:. Officially reserved for Apple's portables only, the mode was supported by all PowerBooks except the
88:. Target Disk Mode is the preferred form of old-computer to new-computer interconnect used by Apple's
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CD/DVD drives and other internal and external peripheral hardware available to the host computer.
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series and FireWire-equipped Macs. As long as the requisite software appeared in the system
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Target Disk Mode is useful for accessing the contents of a Mac which cannot load its own
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When a Mac that supports Target Disk Mode is started with the 'T' key held down, its
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Target Disk Mode was originally called SCSI Disk Mode, and a special cable (
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43:
427:
428:"Adapters for the Thunderbolt 4, Thunderbolt 3, or USB-C port on your Mac"
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405:
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463:"FireWire Target Disk Mode: Target Computer Shuts Down at Startup"
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The target computer (the computer to be placed into TDM) must:
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442:"Transfer files between two computers using target disk mode"
267:. On Classic Mac OS, this means FireWire 2.3.3 or later and
205:, Apple replaced Target Disk Mode with Mac Sharing Mode.
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When Apple dropped the SCSI interface, starting with the
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does not boot. Instead, the Mac's firmware enables its
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Apple introduced disk mode access with the original
271:.6 or later are required to use a FireWire target.
282:, it has also become possible for Macs running
116:and continued to offer it with most subsequent
223:Be any Macintosh except the following models:
8:
198:connector on the other end for the MacBook.
356:"Borrow an optical drive from another Mac"
124:, the Mac could be booted into disk mode.
100:, which TDM does not. Neither supports
16:Boot mode on certain Macintosh computers
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404:Fleishman, Glenn (27 February 2011).
383:"Macbook Pro EFI Firmware Update 2.2"
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321:
232:Power Macintosh G3 (Blue & White)
7:
23:Apple G3 iMac booted in Target Mode
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406:"Secrets of Thunderbolt and Lion"
354:Griffiths, Rob (March 27, 2007).
217:Have FireWire or Thunderbolt Port
237:iBook G3 models without FireWire
220:Have an ATA device at ATA bus 0
203:Mac transition to Apple silicon
92:. Migration Assistant supports
1:
484:"Blue and White Power Mac G3"
328:Apple Inc (16 January 2002).
194:supports Target Disk Mode.
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334:Apple Developer Connection
274:The host computer may run
30:(sometimes referred to as
292:preferred to use Mac OS.
265:Hierarchical File System
505:"Power Mac G4 (Yikes!)"
263:the correct version of
24:
22:
186:“Pismo” PowerBook G3
227:iMac (Tray-Loading)
209:System requirements
134:With the change to
90:Migration Assistant
75:mass storage device
536:Macintosh platform
330:"Target Disk Mode"
242:Power Macintosh G4
138:starting with the
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507:. August 31, 1999
486:. January 5, 1999
276:Microsoft Windows
129:SCSI System Cable
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182:AGP Power Mac G4
86:operating system
51:operating system
28:Target Disk Mode
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244:(PCI Graphics)
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57:to behave as a
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140:PowerBook 150
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114:PowerBook 100
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509:. Retrieved
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488:. Retrieved
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467:. Retrieved
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446:. Retrieved
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410:. Retrieved
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389:15 September
387:. Retrieved
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365:. Retrieved
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27:
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412:27 February
367:October 21,
250:(2008-2010)
248:MacBook Air
192:Thunderbolt
96:(wired) or
67:Thunderbolt
46:computers.
36:Target Mode
525:Categories
511:2013-11-12
490:2013-11-12
469:2012-05-22
448:2014-05-28
302:LIO Target
136:IDE drives
408:. TidBITS
280:Boot Camp
256:(Unibody)
201:With the
175:interrupt
118:PowerBook
73:external
44:Macintosh
361:Macworld
296:See also
269:Mac OS 8
94:Ethernet
63:FireWire
385:. Apple
339:13 July
307:NetBoot
284:Windows
254:MacBook
108:History
38:) is a
151:driver
55:drives
531:MacOS
313:Notes
289:Linux
98:Wi-Fi
71:USB-C
69:, or
414:2011
391:2011
369:2023
341:2007
184:and
169:and
163:145B
142:and
59:SCSI
40:boot
171:170
167:150
159:145
155:140
148:ATA
144:190
122:ROM
102:USB
34:or
32:TDM
527::
358:.
332:.
320:^
165:,
161:,
157:,
77:.
65:,
61:,
514:.
493:.
472:.
451:.
430:.
416:.
393:.
371:.
343:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
