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Questions tagged [apple-hardware-test]

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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Repeated MacBook Pro 2012 HDD Cable Failures

Two weeks ago, a friend's mid-2012 MacBook Pro gave the dreaded question mark folder upon attempting to wake from sleep. I pulled the drive and checked it (backed up, SMART status passed, 70+ MBps ...
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(AHT) Anatomy of the Apple Hardware Test error code

I have these error codes from a Apple Hardware Test. After some research I found this and this which enabled me to translate the most essential facts behind them. However, some questions still remain, ...
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59 views

Internet Recovery instead of Hardware Diagnostics?

I'm trying to run hardware diagnostics on my mid-2012 MacBook Pro. Whenever I restart when holding D it restarts into Internet Recovery mode instead of Hardware Diagnostics mode. Is there any way to ...
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1answer
436 views

Can't enter Apple Hardware Test Mode on my macbook pro

I have an Early 2011 MacBook Pro. When I hold down D immediately after restart, it boots to the normal login screen. When I hold down ALT+D (with a working wifi connection before the reboot) the same ...
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1answer
159 views

MacBook Pro 2012 15" can’t boot

When I turn it on, it shows the Apple logo and starts loading up to about 50%, then the screen turns black. Running the hardware test shows this: Alert! Apple Hardware test has detected an error. ...
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1answer
111 views

iMac 12,2 - Likely hardware problem: How to properly diagnose?

The problem: All applications that are launched on the iMac take a very long time to start. E.g. on a clean startup Word takes about 40 seconds to fully start, Adobe Reader about double. The same ...
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2answers
82 views

Should I be worried about a hardware error if my MacBook Pro is running ok?

I have recently had some trouble with my MacBook Pro 8.1 (Early 2011). After running tests, installing the old 2x2 GB RAM sticks and basically trying else everything to restore it, it turned out that ...
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1answer
255 views

Bad Mac Mini 2012 passes AHT, but ASD shows several errors/failures. Logic board failure?

I have a 2012 Mac mini running Mac OS X 10.8 that doesn't boot properly. Sometimes the USB ports don't work after boot and/or the Mac mini crashes after bootup. Graphics are not crisp when output from ...
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1k views

How do I get Apple Hardware Test working on a refurbished Mac?

I recently picked up a refurbished "Unibody" Late 2009 MacBook, which arrived with a fresh Sierra (10.12) install. After going through the first time setup, I immediately upgraded RAM and HD. After ...
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1answer
1k views

Apple Hardware Test doesn't run with original disk

I have the original disks to my Macbook Pro mid-2010. Holding D or option-D at startup launches internet recovery, which ultimately gives error -3403D in both cases. (I was expecting only option-D to ...
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341 views

Hardware crash on my MacBook Pro (13-inch, Mid 2012)

Last Tuesday my computer crashed during a Skype meeting, it froze, the screen went black and 3 beeps started to sound in series. I googled the symptom and found out that it was related to a memory ...
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1answer
1k views

How to solve error 4SNS/1/40000000:VDOR-18.507?

I've been experiencing issues with my old MacBook Pro, early 2011, A1297. It started showing some vertical stripes, but resetting the PRAM did help. Some time later it ran into RAM issues, but ...
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0answers
59 views

Testing Hardware of MacBook

I have a strange problem Sierra sudden shutdown and WiFi crashlogs. So far I tested the hardware with Apple Hardware Test and some tools for RAM and GPU. None found a problem. Are there some others to ...
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1answer
34 views

Folder with sign question (no issues in hardware) - help

I got a macbook pro 13inchs (2011), Yosemite. One week ago a folder with a sign question appeared in the first screen and that's where all my problems started. I follow some links in order to ...
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2answers
2k views

Can't boot Apple Hardware Test with correct install disk that has AHT

I just restored my HD from a Time Machine backup and afterward my AHT won't work, despite the fact that I have the original install disk (10.5 Leopard, disk #2 that says it has AHT on it). AHT worked ...
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1answer
64 views

Apple AHT occasionally freezing MacBook Pro late 2011 OS X Lion

Running Apple Hardware Test (AHT) repeatedly on a late 2011 Macbook Pro over Wi-Fi (Option D). Completes the process sometimes and says no problems but sometimes freezes (has done so during RAM ...
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1answer
1k views

MacBook Pro Retina 2012 - sensor issue

I have a late 2012 MacBook Pro with Retina Display and recently I've had some issues with it. Firstly it began to not charge properly - the charger light would stay orange and never go to green, and ...
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1answer
677 views

A1181: How to run ASD or AHT on this macbook?

I have Lion installed on this 2007 macbook. OS was installed from A1384 USB drive. How do I run AHT (or ASD) on this macbook? I tried hitting / holding "D" during normal bootup and it will start ...
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2answers
796 views

Why do Apple Store insist on decrypting FileVault to run diagnostics?

Much to my horror, my MacBook screen cracked the other day and had to be replaced. I took the machine to an Apple Store and a Genius checked it in for repair. The Genius said that they would, ...
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225 views

Is it dangerous to use an iMac with broken USB ports? Is there such a thing as Firewire or display-port to USB?

I've got a mid-2010 iMac, 21", i3 processor with 4gb RAM installed which has only one partially-usable USB port, which will power a 3rd-party mouse, wireless dongle, or a keyboard sometimes, but not ...
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0answers
27 views

Keyboard unresponsive out of nothing

I have an old 13” MBP (Early 2011) which I use regularly but just a few minutes per day. Today I came back home - MBP was turned on and charging - and keyboard just doesn’t seem to work. Some keys (...
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1answer
4k views

What does “-501 0D” mean when trying to run the Apple Hardware Test?

I have a late 2012 iMac running El Capitan which has become quite sluggish. I’ve tried a few software solutions, but I think it’s something wrong with the disk. (A lot of stuff is fine; anything that ...
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2answers
9k views

( Performance advantage )2015 Macbook pro 13" 8GB vs 16GB model? [closed]

I m planning to buy Macbook pro 13" 2015 model for day to day development purpose. I m confused b/w 8GB and 16GB version.!! Does 16GB version gives much performance advantage over 8GB version?? Any ...
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1answer
4k views

How do u remove an iPad virus [closed]

I have an iPad Air 2 using netstat app. showed me I have compute-1.amazonaws.com running I googled it an it said its a virus. Does anyone no how to remove it I've cleared browser history, factory ...
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1answer
315 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 OS....
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2answers
805 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 ...
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1answer
72 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
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1answer
771 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
89 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 ...
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2answers
3k 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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1answer
8k 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 ...
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1answer
4k 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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1answer
12k 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
842 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
3k 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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3answers
28k 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 ...
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1answer
2k 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 ...
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1answer
3k 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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4answers
11k 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 fails,...
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1answer
2k 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
1k 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 (64-...
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3answers
18k 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 ...
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2answers
16k 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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3k 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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2answers
2k 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
5k 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
11k 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 ...
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1answer
7k 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
5k 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 ...
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11answers
153k 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 ...