A hardware test used by holding D during boot, to test internal components of a Mac. It was replaced by Apple Diagnostics in Macs released after June 2013.

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1answer
35 views

Big binary file in all OSX/Linux?

I need to find test binary data for the command xxd -ps file which is some GB or at least several MBs. I am using at the moment /usr/bin/telnet but it is not big and heterogenous between different ...
0
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2answers
23 views

Apple iMac Hardware Test: 4SNS : VH1R

I have some weird fan issues with my iMac. It sometimes goes to maximum speed but only for a couple of seconds and then goes back to normal. Without doing any heavy processing. The hardware test tells ...
0
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1answer
18 views

I have an apple macbook pro i7 17" mid 2010 model 6,1. I need to do a hardware diagnostic on it, but don't have the DVD anymore, how can I do it?

I need to to do a diagnostic test on my hardware, but don't have the diagnostic DVD anymore. can I download it from some database? it is a macbook pro 17" i7 2.66 Ghz model 6,1 mid 2010
0
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1answer
47 views

My RAM was bad (“three beeps” bad) until shuffled

I've got an early 2011 13" i7 MBP, OS X 10.10.3 (the public beta version before the one released last night) with 10 GB of RAM – one of the original 2 GB modules in the bottom slot and an 8 GB module ...
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0answers
34 views

2009 Mac Mini Wakes Up Immediately After Sleep. What Could be Wrong?

This computer would sleep fine before. Now it wakes up immediately after sleeping, either from a timer, or from the Sleep menu item. Even if all USB ports (except the wireless mouse) are empty Even ...
0
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2answers
480 views

On Macbook Pro, how to tell if my hard drive access speed is a bottleneck to my current computer performance?

I'm considering giving my 2010 Macbook Pro an upgrade. Whether upgrading its 500 GB hard drive to SSD drive is a priority depends on how much it bottlenecks the computer's performance. Is there a ...
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votes
1answer
241 views

How can erase my IPhone using its home,power, or volume buttons? [closed]

I forgot the password to iPhone and I tried over and over using different buttons.... differently but first i started by holding down the power button and pressing the home button simultaneously. This ...
0
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1answer
2k views

How to run Apple Hardware Test with broken keyboard?

mid-2011 13" MBA running Yosemite Coffee spill has left keyboard of mid-2011 13" MBA non-functioning. Even power button doesn't work, I boot by shorting the two solder points on logic board. I've ...
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0answers
622 views

Mac Pro 1,1 running Mac OS 10.6.8

Am having finder freezing problems on Mac Pro 1,1 running 10.6.8. I want to run Apple Hardware Test software but I don't have the disk. I downloaded the program from Github and copied it to DVD, but ...
0
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1answer
2k views

Macbook pro showing “Starting Internet Recovery” instead of AHT

I try to make a long AHT test on my mid 2014 Macbook Pro. When I press D (same with alt-D) on boot it says : Starting Internet Recovery Restart Shutdown After a few seconds, it launches ...
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2answers
301 views

MacBookPro10,1 goes to gray screen when a USB is inserted

This is a follow up to my other question. Now the problem is sometimes when inserting a USB stick, the computer freezes and goes to a complete gray screen(kernel panic). It seems to only happen if ...
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2answers
1k views

Can't run Apple Hardware Test as Mac crashes

My Macbook: Apple MacBook "Core 2 Duo" 2.0 13" (White/07). Main problem: Mac goes black screen and shuts down when I try and load the Apple HW Test by holding down D as the computer turns on. It goes ...
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votes
2answers
19k views

How to run apple hardware test on mavericks?

I have a 2009 IMac, which came with Mountain Lion. I've upgraded to 10.9.latest (Mavericks). Now, my imac has started freezing up all the time - I've tried reinstalling from the recovery partition but ...
0
votes
1answer
409 views

How can I run Apple Hardware Test with a firmware password set?

I have a firmware password set using the Firmware Password Utility. When I hold D immediately after power-on to start Apple Hardware Test, nothing happens. My computer boots normally. How can I ...
1
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1answer
2k views

Make Apple Hardware Test work on Mid 2009 MBP with OS X Mavericks

I had some graphics issues after running Bluestacks to run WhatsApp. The screen flickered until I shut down the app and I got worried. So wanted to verify my system using AHT. I got a AHT .pkg ...
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3answers
6k views

Replacing “apple hardware test” with “apple diagnostics”

According to this article, holding down the "D" key while my MacBookPro11,3 boots should bring up "Apple Diagnostics". However, "Apple Hardware Test" comes up instead. When I try to run in, it ...
1
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1answer
476 views

Memory test that fails with a different address each time

I had problems (strange patterns on the display and reboots) with my Late 2011 Macbook Pro, so I ran Apple Hardware Test on my computer, and it found memory errors. The thing is that every time I run ...
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2answers
519 views

How to test memory after memory upgrade?

I recently upgraded my macbook from 4G to 8G and wonder if there's a tool to test the quality of new memory. I found memtest 4.22 seems only test about 1G: $ memtest all 2 Memtest version 4.22 ...
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3answers
10k views

Is there a way to run the Apple Hardware Test without an optical drive?

I have a MacBook Pro 13", Mid-2009 and it came with Mac OS X 10.6 Snow Leopard. As I understand it, that means I would have to use the DVDs provided by Apple to boot into Apple Hardware Test. The ...
3
votes
2answers
5k views

What Information Is Gleaned From Conducting An Apple Hardware Test?

What information is gleaned from conducting an Apple Hardware Test ( or Apple Diagnostics for Macs purchased from June 2013), when trying to find out if something is wrong with my Mac ?
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votes
1answer
955 views

Why does my macbook always shut down on recovery?

Hi am trying to fix a MacBook Unibody Model A1342, The macbook has an unknown error that might also be caused by water accident or drop or just internal problems. (I dont know about the macbooks ...
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votes
2answers
754 views

precaution or steps to take before booting up 4 months unused macbook air

My mother was ill for quite some-time, and she didn't use her MacBook Air for almost 4 months now. Before booting it up again, and start making use, please let me know if there are some necessary ...
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2answers
3k views

How to interpret outcome of Apple Hardware Test on Malfunctioning Macbook-Pro/Snow Leopard

Here are some tests I have when I ran Apple Hardware Test from original Tiger install disc. My issue is recurrent worsening inconsistent kernel panics. The Hardware Test hangs up at 35 seconds, ...
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2answers
7k views

How to run the Apple Hardware Test in Snow Leopard on a MacBook Pro?

I have a MacBook Pro with Snow Leopard. I have an image of the Installation Disk in a USB Hard Drive (Snow Leopard Partition). Then to boot the system and start using the Hardware Test software I did ...
7
votes
1answer
6k views

Testing a MacBook Pro's RAM upgrade

What are the best possible RAM tests that can be run on a MacBook Pro (Early 2011 running Mountain Lion) after upgrading RAM from 4 GB to 16 GB? I see there a quite a few tools out there and the ...
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2answers
3k views

Can't get Apple Hardware Test to work

So I'm trying to run the Apple Hardware Test. I start the computer up and hold "D". It boots into OS X like a normal startup. So, I plug in the Ethernet and hold option-D to do the AHT from the ...
13
votes
11answers
59k views

Why is Apple hardware test (AHT) not loading when pressing key D on system start?

I purchased a Late-2011 MacBook Pro 15" used a month ago. At the time of purchase, I successfully ran the Apple Hardware Test. I've since installed a new SSD and aftermarket RAM. The computer appears ...
2
votes
1answer
928 views

How can I run a hardware test in lion?

My Mac was shipped with Lion. Therefore I have no install CDs that I could use to run a hardware test. How can I run a hardware test?
2
votes
1answer
363 views

How much time would pass before overwriting data on iPod/iPhone flash memory results in failure?

Just for the sake of this question. Let's say I have a file that fills my iPod completely, and I set an automated test to save this file into my iPod and overwrite it, non stop. How much time will ...
1
vote
1answer
3k views

How to test my video memory on a 2010 13" MacBook Pro?

I have MacBook Pro 13" Mid 2010, NVIDIA GeForce GT 320M Recently (but right after installing OS X Lion) I've encountered artifacts on my screen. It's quite often and I can't say if the problem came ...
2
votes
1answer
1k views

MacMini crashing after changing memory?

After I bought a new MacBook Pro 2011 with 4 GB or RAM at 1333 MHz I decided to switch the RAM with the one from the old MacMini 8 Gb at 1066 MHz. Initially I was expecting to have problems with the ...
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votes
2answers
11k views

How can I perform an Apple Hardware Test without my original install media?

I have a 2007 MacBook that I'd like to perform an Apple Hardware Test on, but I don't have the original install media. I have a Snow Leopard install DVD, but rebooting and holding down D does not ...
3
votes
1answer
8k views

Why is my MacBook Pro's fan constantly on at 6000RPM?

I recently replaced the logic board on my Mac, now I have this "fan constantly on at 6000RPM all the time" issue. So I did an Apple hardware test using the installation disk that came with my Mac and ...