Download t:connect (8 MB) Mac System Requirements I need Windows Software. 1 GB of available disk space. X86 compatible 1.6 GHz processor or faster. USB 1.1 port (or later) Display capable of at least 1024 by 768 resolution. First of all, you will need to download either Andy or BlueStacks on your PC by using the free download option made available within the very beginning of this webpage. After the download process completes double click the installer to start the set up process. In the installation process just click on 'Next' for the first couple of steps. Hardware Diagnostic Software for Mac – DiskWarrior. Disk Warrior is the most advanced repair and recovery tool for the mac users and allows you to restore your data from a single click. The tool is amazingly easy to use and very reliable. 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.
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The Apple Hardware Test
The Apple® Hardware Test is an important troubleshooting utility that began shipping with new Macintosh® computers sometime in the year 2000. If your Mac predates the inclusion of the Apple Hardware Test, see the section 'My Mac predates the Apple Hardware Test' below.
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This FAQ is based on the 'Hardware Testing' chapter of our book, Troubleshooting Mac® OS X.
Running the Apple Hardware Test
The Apple Hardware Test was originally distributed on an Apple Hardware Test CD. It is now distributed on a special volume on the Mac OS X Install Disc 1 DVD included with the computer. Each Apple Hardware Test is specific to the type and model of Mac with which it was distributed.
To run the Apple Hardware Test, you must start up from the disc or volume containing the test:
| If you have: | Then: | |||||||||||||
| An Apple Hardware Test CD: | Start up from it as you would any other bootable disc: | |||||||||||||
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| An Intel®-based Mac: | See the AppleCare® Knowledge Base document 'Intel-based Macs: Using Apple Hardware Test.' Note: If you have a MacBook Air®, see the AppleCare Knowledge Base document 'MacBook Air: Using Apple Hardware Test.' | |||||||||||||
| A PowerPC™-based Mac with an Apple Hardware Test volume on Install Disc 1: |
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| None of the above: | Consult the printed manual that accompanied your Mac for instructions on how to use the Apple Hardware Test that shipped with your computer. |
After starting up from the Apple Hardware Test, run the Extended Test.
You may want to run the Extended Test several times in a row as intermittent problems may not show up in every execution of the test.
If the test fails, be sure to write down the exact message associated with the failure.
Running the Apple Hardware Test in Loop Mode
Running the Apple Hardware Test in Loop Mode overnight is an excellent troubleshooting step for finding intermittent hardware problems. It is especially useful when troubleshooting intermittent kernel panics.
If Loop Mode is supported by the version of the Apple Hardware Test you are using, you run the Extended Test in Loop Mode by pressing Control-L before starting the test. Looping On should appear in the right window. Then click the Extended Test button.
The test will run continuously until a problem is found. If a problem is found, the test will cease to loop, indicating the problem it found. If the test fails, be sure to write down the exact message associated with the failure.
Intermittent RAM problems may take many loops to appear: let the test run overnight.
If no problems are found after running the Extended Test in Loop Mode overnight, you can stop the Extended Test and exit Loop Mode by either:
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- Pressing the Command-period keyboard shortcut, i.e. Command-.
- Clicking the Cancel or Stop Test buttons. This can be difficult to do in Loop Mode.
- Manually restarting your Mac. Restarting manually, i.e. via either the power button or — if your Mac is so equipped — the Reset button, when you have started up from the Apple Hardware Test should not cause problems.
My Mac predates the Apple Hardware Test
If your Mac predates the inclusion of the Apple Hardware Test with new computers, you can use the following third-party utilities to test your hardware:
- Micromat® TechTool® Pro includes a comprehensive suite of hardware tests applicable to all Macs. TechTool Pro 4.5.x or later is available as a Universal Binary for both PowerPC- and Intel-based Macs.
- If you purchased an AppleCare Protection Plan, your may have received a Micromat TechTool Deluxe CD that includes some hardware tests. An inexpensive upgrade from TechTool Deluxe to TechTool Pro is available from Micromat.
- The freeware command-line utility Memtest has been used by many to successfully test RAM. The freeware utility Rember provides a graphical user interface (GUI) to Memtest.
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Note: Use only the hardware tests of third-party utilities that combine hardware testing and disk utilities, such as TechTool Pro and TechTool Deluxe, unless the version of your third-party utility also includes disk utilities that are compatible with your version of Mac OS X. In other words, only use disk utilities that are compatible with the version of Mac OS X you are using.
Related links
Aht Apple Hardware Test Download
- All AppleCare Knowledge Base documents related to the Apple Hardware Test.