AppleHardwareTest/Readme.markdown

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Apple Hardware Test (AHT)
=============================
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Description
-------------
Apple computers ship with a pre-installed suite of hardware diagnostic tools, known as Apple Hardware Test (AHT). In principle you can start them by holding the ``d`` key while booting. Newer models support holding ``option d`` to load AHT over the internet. Refer to the official Apple documentation for details: Using AHT on [Intel-based Macs](http://support.apple.com/kb/ht1509), [Mountain Lion](http://support.apple.com/kb/PH11342), [Mavericks](http://support.apple.com/kb/PH14291) and [Yosemite](http://support.apple.com/kb/PH18765). Apple redesigned the AHT, now called [Apple Diagnostics](http://support.apple.com/kb/HT5781), for Macs introduced after June 2013. Consult the [reference codes](http://support.apple.com/en-us/HT203747) to interpret the results.
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If however, you reinstalled an older computer from scratch, the diagnostic tools might no longer be available. Unless you have the original disks that came with your computer, there seems to be no way to restore the AHT.
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It happens that Apple provides disk images with AHT for most computers, but does not make the links publicly available. Various blogs and forums, mostly [Riven by Five](http://rivenbyfive.blogspot.ch/2012/01/download-and-run-apple-hardware-test.html) and [MacForum.ro](http://arhiva.macforum.ro/comunitate/topic/1194-apple-hardware-test/) have gathered a list of download links. The rest were obtained by scraping `http://download.info.apple.com/Apple_Hardware_Test/` for all the links of the form `0(18|22)-\d{4}-A.dmg`.
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Even though there's no guarantee that this list is correct or complete, some links can come in very handy to whoever is trying to debug hardware problems.
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You can use the following terminal commands to determine the model and board ID of your computer:
```sh
system_profiler SPHardwareDataType | grep 'Model Identifier' | awk -F: '{ print $2 }'
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ioreg -l | grep board-id | awk -F\" '{ print $4 }'
```
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Download the AHT for your computer model and use the contents to restore the ``/System/Library/CoreServices/.diagnostics`` folder, then reboot while holding ``d`` to start the diagnostic tools.
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Download Links
----------------
### PowerMac
* [PowerMac v1.2.6, PowerMac G4](http://download.info.apple.com/Apple_Hardware_Test/693-3994-A.dmg)
* [PowerMac v2.2.5GMc2](http://download.info.apple.com/Apple_Hardware_Test/018-1594-A.dmg)
* [PowerMac v2.5GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-1880-A.dmg)
* [PowerMac v2.5.2GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-2216-A.dmg)
### PowerBook
* [PowerBook v1.2.3, PowerBook FireWire, PowerBook G4](http://download.info.apple.com/Apple_Hardware_Test/693-4420-A.dmg)
* [PowerBook v2.5.2GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-2120-A.dmg)
### iBook
* [iBook v2.2.1GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-1680-A.dmg)
* [iBook v2.5GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-2056-A.dmg)
### iMac
* [iMac v2.5.1GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-1879-A.dmg)
* [iMac v2.5.2GMc5](http://download.info.apple.com/Apple_Hardware_Test/018-2158-A.dmg)
* [iMac v2.5.3GMc1](http://download.info.apple.com/Apple_Hardware_Test/018-2215-A.dmg)
* [iMac4,1 3A103](http://download.info.apple.com/Apple_Hardware_Test/018-2392-A.dmg)
* [iMac5,1 Mac-F4228EC8](http://download.info.apple.com/Apple_Hardware_Test/018-2534-A.dmg)
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* [iMac5,1 Mac-F42786A9](http://download.info.apple.com/Apple_Hardware_Test/018-2533-A.dmg)
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* [iMac5,2 Mac-F4218EC8](http://download.info.apple.com/Apple_Hardware_Test/018-2535-A.dmg)
* [iMac6,1 Mac-F4218FC8](http://download.info.apple.com/Apple_Hardware_Test/018-2579-A.dmg)
* [iMac7,1 Mac-F42386C8](http://download.info.apple.com/Apple_Hardware_Test/018-2845-A.dmg)
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* [iMac8,1 Mac-F226BEC8](http://download.info.apple.com/Apple_Hardware_Test/022-3936-A.dmg)
* [iMac8,1 Mac-F227BEC8](http://download.info.apple.com/Apple_Hardware_Test/022-3937-A.dmg)
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* [iMac9,1 Mac-F2218EA9](http://download.info.apple.com/Apple_Hardware_Test/022-4297-A.dmg)
* [iMac9,1 Mac-F2218EC8](http://download.info.apple.com/Apple_Hardware_Test/022-4293-A.dmg)
* [iMac9,1 Mac-F2218FC8](http://download.info.apple.com/Apple_Hardware_Test/022-4294-A.dmg)
* [iMac10,1 Mac-F2268CC8](http://download.info.apple.com/Apple_Hardware_Test/022-4451-A.dmg)
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* [iMac10,1 Mac-F2268CC8](http://download.info.apple.com/Apple_Hardware_Test/022-4647-A.dmg)
* [iMac10,1 Mac-F2268DC8](http://download.info.apple.com/Apple_Hardware_Test/022-4452-A.dmg)
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* [iMac10,1 Mac-F2268DC8](http://download.info.apple.com/Apple_Hardware_Test/022-4644-A.dmg)
* [iMac11,2 Mac-F2238AC8](http://download.info.apple.com/Apple_Hardware_Test/022-4703-A.dmg)
* [iMac11,3 Mac-F2238BAE](http://download.info.apple.com/Apple_Hardware_Test/022-4776-A.dmg)
* [iMac12,1 Mac-942B5BF58194151B](http://download.info.apple.com/Apple_Hardware_Test/022-5090-A.dmg)
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* [iMac12,1 Mac-942B5BF58194151B](http://download.info.apple.com/Apple_Hardware_Test/022-5344-A.dmg)
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* [iMac12,2 Mac-942B59F58194171B](http://download.info.apple.com/Apple_Hardware_Test/022-5091-A.dmg)
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### MacMini
* [MacMini v1.1GMc2](http://download.info.apple.com/Apple_Hardware_Test/018-2079-A.dmg)
* [MacMini1,1 3A102](http://download.info.apple.com/Apple_Hardware_Test/018-2342-A.dmg)
* [MacMini2,1 Mac-F4208EAA](http://download.info.apple.com/Apple_Hardware_Test/018-2886-A.dmg)
* [MacMini3,1 Mac-F22C86C8](http://download.info.apple.com/Apple_Hardware_Test/022-4292-A.dmg)
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* [MacMini4,1 Mac-F2208EC8](http://download.info.apple.com/Apple_Hardware_Test/022-4739-A.dmg)
* [MacMini4,1 Mac-F2208EC8](http://download.info.apple.com/Apple_Hardware_Test/022-4706-A.dmg)
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* [MacMini5,1 Mac-8ED6AF5B48C039E1](http://download.info.apple.com/Apple_Hardware_Test/022-5207-A.dmg)
* [MacMini5,2 Mac-4BC72D62AD45599E](http://download.info.apple.com/Apple_Hardware_Test/022-5207-A.dmg)
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### MacPro
* [MacPro1,1 Mac-F4208DC8](http://download.info.apple.com/Apple_Hardware_Test/018-2769-A.dmg)
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* [MacPro2,1 Mac-F4208DA9](http://download.info.apple.com/Apple_Hardware_Test/018-2667-A.dmg)
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* [MacPro3,1 Mac-F42C88C8](http://download.info.apple.com/Apple_Hardware_Test/018-3273-A.dmg)
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* [MacPro3,1 Mac-F42C88C8](http://download.info.apple.com/Apple_Hardware_Test/022-3843-A.dmg)
* [MacPro3,1 Mac-F42C88C8](http://download.info.apple.com/Apple_Hardware_Test/022-4020-A.dmg)
* [MacPro4,1 Mac-F221BEC8](http://download.info.apple.com/Apple_Hardware_Test/022-4149-A.dmg)
* [MacPro5,1 Mac-F221BEC8](http://download.info.apple.com/Apple_Hardware_Test/022-4831-A.dmg)
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### MacBook
* [MacBook2,1 Mac-F4208CA9](http://download.info.apple.com/Apple_Hardware_Test/018-2590-A.dmg)
* [MacBook2,1 Mac-F4208CAA](http://download.info.apple.com/Apple_Hardware_Test/018-2766-A.dmg)
* [MacBook3,1 Mac-F22788C8](http://download.info.apple.com/Apple_Hardware_Test/018-3085-A.dmg)
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* [MacBook4,1 Mac-F22788A9](http://download.info.apple.com/Apple_Hardware_Test/022-3862-A.dmg)
* [MacBook5,1 Mac-F42D89A9](http://download.info.apple.com/Apple_Hardware_Test/022-4216-A.dmg)
* [MacBook5,1 Mac-F42D89C8](http://download.info.apple.com/Apple_Hardware_Test/022-4037-A.dmg)
* [MacBook5,2 Mac-F22788AA](http://download.info.apple.com/Apple_Hardware_Test/022-4299-A.dmg)
* [MacBook6,1 Mac-F22C8AC8](http://download.info.apple.com/Apple_Hardware_Test/022-4453-A.dmg)
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* [MacBook7,1 Mac-F22C89C8](http://download.info.apple.com/Apple_Hardware_Test/022-4705-A.dmg)
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### MacBookPro
* [MacBookPro1,1 3A106](http://download.info.apple.com/Apple_Hardware_Test/018-2398-A.dmg)
* [MacBookPro1,1 3A107](http://download.info.apple.com/Apple_Hardware_Test/018-2405-A.dmg)
* [MacBookPro2,1 Mac-F42189C8](http://download.info.apple.com/Apple_Hardware_Test/018-2592-A.dmg)
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* [MacBookPro2,2 Mac-F42187C8](http://download.info.apple.com/Apple_Hardware_Test/018-2591-A.dmg)
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* [MacBookPro3,1 Mac-F42388C8](http://download.info.apple.com/Apple_Hardware_Test/018-2833-A.dmg)
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* [MacBookPro3,1 Mac-F4238BC8](http://download.info.apple.com/Apple_Hardware_Test/018-2770-A.dmg)
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* [MacBookPro4,1 Mac-F42C86C8](http://download.info.apple.com/Apple_Hardware_Test/022-3832-A.dmg)
* [MacBookPro4,1 Mac-F42C89C8](http://download.info.apple.com/Apple_Hardware_Test/022-3833-A.dmg)
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* [MacBookPro5,1 Mac-F42D86A9](http://download.info.apple.com/Apple_Hardware_Test/022-4266-A.dmg)
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* [MacBookPro5,1 Mac-F42D86C8](http://download.info.apple.com/Apple_Hardware_Test/022-4048-A.dmg)
* [MacBookPro5,2 Mac-F2268EC8](http://download.info.apple.com/Apple_Hardware_Test/022-4217-A.dmg)
* [MacBookPro5,3 Mac-F22587C8](http://download.info.apple.com/Apple_Hardware_Test/022-4343-A.dmg)
* [MacBookPro5,4 Mac-F22587A1](http://download.info.apple.com/Apple_Hardware_Test/022-4344-A.dmg)
* [MacBookPro5,5 Mac-F2268AC8](http://download.info.apple.com/Apple_Hardware_Test/022-4339-A.dmg)
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* [MacBookPro6,1 Mac-F22589C8](http://download.info.apple.com/Apple_Hardware_Test/022-4596-A.dmg)
* [MacBookPro6,2 Mac-F22586C8](http://download.info.apple.com/Apple_Hardware_Test/022-4597-A.dmg)
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* [MacBookPro7,1 Mac-F222BEC8](http://download.info.apple.com/Apple_Hardware_Test/022-4653-A.dmg)
* [MacBookPro8,1 Mac-94245B3640C91C81](http://download.info.apple.com/Apple_Hardware_Test/022-5052-A.dmg)
* [MacBookPro8,2 Mac-94245A3940C91C80](http://download.info.apple.com/Apple_Hardware_Test/022-5053-A.dmg)
* [MacBookPro8,3 Mac-942459F5819B171B](http://download.info.apple.com/Apple_Hardware_Test/022-5054-A.dmg)
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* [MacBookPro9,1 Mac-4B7AC7E43945597E](http://download.info.apple.com/Apple_Hardware_Test/022-5879-A.dmg)
* [MacBookPro9,2 Mac-6F01561E16C75D06](http://download.info.apple.com/Apple_Hardware_Test/022-5879-A.dmg)
* [MacBookPro10,1 Mac-C3EC7CD22292981F](http://download.info.apple.com/Apple_Hardware_Test/022-5882-A.dmg)
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### MacBookAir
* [MacBookAir1,1 Mac-F42C8CC8](http://download.info.apple.com/Apple_Hardware_Test/018-3259-A.dmg)
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* [MacBookAir2,1 Mac-F42D88C8](http://download.info.apple.com/Apple_Hardware_Test/022-4114-A.dmg)
* [MacBookAir3,1 Mac-942452F5819B1C1B](http://download.info.apple.com/Apple_Hardware_Test/022-4704-A.dmg)
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* [MacBookAir3,2 Mac-942C5DF58193131B](http://download.info.apple.com/Apple_Hardware_Test/022-4267-A.dmg)
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* [MacBookAir4,1 Mac-C08A6BB70A942AC2](http://download.info.apple.com/Apple_Hardware_Test/022-5205-A.dmg)
* [MacBookAir4,2 Mac-742912EFDBEE19B3](http://download.info.apple.com/Apple_Hardware_Test/022-5205-A.dmg)
* [MacBookAir5,1 Mac-66F35F19FE2A0D05](http://download.info.apple.com/Apple_Hardware_Test/022-5745-A.dmg)
* [MacBookAir5,2 Mac-2E6FAB96566FE58C](http://download.info.apple.com/Apple_Hardware_Test/022-5745-A.dmg)
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### Xserve
* [Xserve1,1 Mac-F4208AC8](http://download.info.apple.com/Apple_Hardware_Test/018-3282-A.dmg)
* [Xserve2,1 Mac-F42289C8](http://download.info.apple.com/Apple_Hardware_Test/018-3282-A.dmg)
### Misc
* [unidentified](http://download.info.apple.com/Apple_Hardware_Test/018-2393-A.dmg)
* [unidentified](http://download.info.apple.com/Apple_Hardware_Test/018-2418-A.dmg)
* [Bundle](http://download.info.apple.com/Apple_Hardware_Test/018-3169-A.dmg)
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- MacBook3,1 Mac-F22788C8
- MacBookPro3,1 Mac-F42388C8
- MacBookPro3,1 Mac-F4238BC8
- MacMini2,1 Mac-F4208EAA
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- MacPro1,1 Mac-F4208DC8
- MacPro2,1 Mac-F4208DA9
- iMac5,2 Mac-F4218EC8
- iMac7,1 Mac-F42386C8
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- iMac7,1 Mac-F4238CC8
* [Bundle](http://download.info.apple.com/Apple_Hardware_Test/018-3254-A.dmg)
- MacBook3,1 Mac-F22788C8
- MacBookPro3,1 Mac-F42388C8
- MacBookPro3,1 Mac-F4238BC8
- MacMini2,1 Mac-F4208EAA
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- MacPro1,1 Mac-F4208DC8
- MacPro2,1 Mac-F4208DA9
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- iMac5,2 Mac-F4218EC8
- iMac7,1 Mac-F42386C8
- iMac7,1 Mac-F4238CC8
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* [Bundle](http://download.info.apple.com/Apple_Hardware_Test/022-5348-A.dmg)
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- MacBook6,1 Mac-F22C8AC8
- MacBook7,1 Mac-F22C89C8
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- MacBookPro8,1 Mac-94245B3640C91C81
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- MacBookPro8,2 Mac-94245A3940C91C80
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- MacBookPro8,3 Mac-942459F5819B171B
- MacPro4,1 Mac-F221BEC8
- MacPro5,1 Mac-F221BEC8
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- iMac12,1 Mac-942B5BF58194151B
- iMac12,2 Mac-942B59F58194171B
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* [Bundle](http://download.info.apple.com/Apple_Hardware_Test/022-6031-A.dmg)
- MacBookAir5,1 Mac-66F35F19FE2A0D05
- MacBookAir5,2 Mac-2E6FAB96566FE58C
- MacBookPro9,1 Mac-4B7AC7E43945597E
- MacBookPro9,2 Mac-6F01561E16C75D06
- MacBookPro9,2 Mac-7DF2A3B5E5D671ED
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- MacBookPro10,1 Mac-C3EC7CD22292981F
- MacBookPro10,2 Mac-AFD8A9D944EA4843
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- MacMini6,1 Mac-031AEE4D24BFF0B1
- MacMini6,2 Mac-F65AE981FFA204ED
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- iMac12,1 Mac-942B5BF58194151B
- iMac13,1 Mac-00BE6ED71E35EB86
- iMac13,2 Mac-FC02E91DDD3FA6A4
### Hosted on third-party servers
* [Bundle](http://arhiva.macforum.ro/comunitate/files/file/14-apple-hardware-test-imac101/)
- MacBook5,1 Mac-F42D89A9
- MacBook5,1 Mac-F42D89C8
- MacBook5,2 Mac-F22788AA
- MacBook6,1 Mac-F22C8AC8
- MacBookAir2,1 Mac-F42D88C8
- MacBookPro5,1 Mac-F42D86A9
- MacBookPro5,1 Mac-F42D86C8
- MacBookPro5,2 Mac-F2268EC8
- MacBookPro5,3 Mac-F22587C8
- MacBookPro5,4 Mac-F22587A1
- MacBookPro5,5 Mac-F2268AC8
- MacMini3,1 Mac-F22C86C8
- iMac9,1 Mac-F2218EC8
- iMac9,1 Mac-F2218FC8
- iMac10,1 Mac-F2268CC8
- iMac10,1 Mac-F2268DC8
- iMac11,1 Mac-F2268DAE