Tagged Questions

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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0
votes
1answer
22 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 ...
0
votes
2answers
37 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 ...
1
vote
2answers
128 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 ...
2
votes
2answers
6k 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
115 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 ...
0
votes
0answers
61 views

How to check if SMC is functioning OK?

Is there a way to check if the System Management Controller (SMC) is working with no issues on MacBook Pro 13' Early 2011? Can I run selective Apple Hardware Tests to check only specific hardware ...
1
vote
1answer
1k 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 ...
1
vote
3answers
3k 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
vote
1answer
264 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 ...
1
vote
2answers
195 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 ...
1
vote
2answers
7k 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 ...
2
votes
2answers
3k 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 ?
0
votes
1answer
510 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 ...
-2
votes
2answers
376 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 ...
1
vote
2answers
2k 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, ...
0
votes
2answers
6k 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 ...
6
votes
1answer
5k 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 ...
1
vote
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 ...
9
votes
10answers
33k 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
912 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
303 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 ...
5
votes
2answers
10k 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
6k 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 ...