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‎Buying checklist that must download when you buy iPhone/iPad. Test and check most of the iOS device functions to ensure that the device is working properly. This app will help you perform a hardware test on the iOS device. You can also use this app to see device specification information and device.

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We associate a Mac with quality, capacity, speed, and reliability. But it might happen so that your Mac underperforms and unpredictable issues occur. Before taking it to the nearest Apple service, you can try to identify the problem by yourself. That will save your time and money, and prevent serious system crashes. Identifying whether the issue is a hardware or software one will determine the possible actions and next steps.

When we deal with the hardware problem, the first thing to try is to perform Apple Diagnostics (or Apple Hardware Test). It will help you reveal the process that causes the problem and lowers Mac productivity.

Apple Diagnostics is an easy-to-understand tool that provides detailed results and suggestions with the next steps. Whether you are a techie or not, you'll get everything easily.

What is Apple Diagnostics?

Apple Diagnostics is a built-in test that helps detect what hardware components are causing the problem, and find system failures. The test checks RAM, power controller, logic board, battery, and other wireless modules.

That was the hard part. And the easy part is that you can run Apple Diagnostics in just a few steps. The whole process will take about 2-5 minutes — but ultimately saves hours of your time.

A great feature of Apple test is that after hardware checking, it displays an error code, offers you clear solutions, and the assistance of Apple Support. You can write out the error codes (known as reference codes), and either do the research on/ your own or contact Apple.

When referring to Mac hardware test, you might also hear about Apple Hardware Test (AHT). This is an older brother of Apple Diagnostics (AD), and they have some minor differences. Mainly, the results of AHT aren't conclusive and descriptive. AHT is used in Macs released in 2012 or earlier, while AD is a more advanced analog that works with newer Macs.

Essentially, a Mac hardware test is the great tool to help you understand the problem. And if it doesn't have a fix for it — there are more advanced tools that you can use to troubleshoot Mac issues. More about that in a moment.

How to run Mac diagnostics

Running a hardware test on Mac may seem like a complicated process, but believe us — that's not:

  1. Disconnect all the peripheral devices (printer, cables, external DVD drive) except the keyboard, mouse, display, and speakers. Make sure your Mac is connected to mains power and the internet.
  2. Select Apple Menu > Restart
  3. Press and hold the D key until you see a list of different languages on the screen
  4. Select a language. Apple Diagnostics starts automatically.
  5. Wait for about 2-5 minutes until the checking is completed. If any problems are found, you'll see the options of solutions and an error code.

After that, you can either repeat the test, get more information, restart or shut down the Mac. That's it - an easy 5-step process, as promised.

Apple recommends to print out the instructions to keep them close at hand and make sure you don't miss any step. Or, you can take a photo. Right, that's what people do in 2021.

What are the common Apple Diagnostics results

After performing a Mac hardware test, you'll get the list of found issues with detailed descriptions and related reference codes. Each code stands for a particular error and helps you quickly figure out the next steps. Usually, an error description will suggest possible solutions. However, to fix a specific problem, Apple Diagnostics might recommend you to contact Apple or take your Mac to an Apple Authorised Service Provider or AppleRetailStore.

There could be the case the system testing doesn't find any issues.

In this case, you have a few options. Please note that they are mutually exclusive, which means you should choose the best option for you:

  1. Repeat the process by hitting Run the test again
  2. Because well, sometimes a small mistake might hamper it all. Maybe the first time you tried to run Apple Diagnostics, your power adapter wasn't plugged in. Connect it and try again — this will help fix the problem.

  3. To get more information on support and service options, click on Get started:
    • The macOS X recovery will start
    • Send your serial number and reference codes to Apple by clicking Agree to send
    • Follow the on-screen instructions.
  4. Restart your Mac
  5. Hit the Shut Down button.

What if you can't run diagnostics

You can face the problem when Apple Diagnostics simply doesn't work. Don't worry, it's solvable. There might be a couple of reasons why this happens:

  1. Some external devices are plugged in. Double-check you've disconnected everything except the keyboard, mouse, display, and speakers.
  2. A part of the diagnostics system can be damaged. You can solve the problem by restarting the Mac while holding down Option+D. This will start an internet-based hardware test.
  3. Firmware password might be the problem. Make sure you turn it off while performing hardware testing.

What if diagnostics found no issues

In case Apple Diagnostics identifies no hardware issues — but your Mac is still misbehaving — maybe, software is the problem.

Often, Macs are slowing down, freezing, or behaving strangely due to full storage, malware, leftovers from uninstalled apps, large and old files. The good news is you don't have to guess, or install many applications to fix each problem separately. An all-in-one tool called CleanMyMac X has all the required functions to test your Mac from a to z. It cleans up, protects, and speeds up your Mac.

Just one click to optimize your Mac — CleanMyMac X makes it fly like a rocket.

Here's how CleanMyMac X optimization works:

  1. Go to the Maintenance tab
  2. Specify what should be done. For example, if you want to speed up your Mac by freeing up some space, check the box next to Free Up Ram”. You can select all the tasks at a time, or choose the particular ones.
  3. Press Run.

Yay, you launched a rocket!

The most common problem that impairs system performance is the junk files that clutter your Mac. You might not even know about them. Luckily, CleanMyMac X has a solution for this, too. Resolve various errors with a great feature called System Junk:

  1. Hit Scan
  2. Once you see the results, press Review Details

You'll see the list of all items that should be cleaned or fixed. You can review the results and deselect those items you're not ready to let go. CleanMyMac X will omit them while cleaning up your Mac. Once you're ready, hit Clean.

Wow, your Mac feels much better now.

Know the reason behind Mac issues

Download And Run Apple Hardware Test (aht) From A Usb Drive

Running Apple Diagnostics is a bit like a shot in the dark. You’re trying to fix something you have no idea about. In some cases, it will work, but you can achieve better results if you know why the issues occur.

Download Apple Hardware Test Dmg

iStat Menus is a utility that sits in the menu bar, with tons of useful real-time insights about your Mac. Check your CPU and GPU usage, memory load, fan speeds, and more in one click. Whenever your Mac is freezing, getting slow, or making loud fan noise, iStat Menus will tell you why it happens.

App Tamer is another utility similar to iStat, but with more focus on idle apps hogging your CPU. See which apps are putting pressure on your Mac and force quit or uninstall them to optimize performance. A nice touch: App Tamer changes its menu icon color when CPU use goes beyond normal.


System performance testing is a handy tool that keeps your Mac healthy, saves your time and money. The primary step is to understand whether the issue is a hardware or software one. While Apple Diagnostics deals with hardware breakdowns, CleanMyMac can fix the software problems.

Doesn't matter if you are a Mac power user or Mac-newbie, these tools will do system testing and optimization for you. To make the most out of your Mac, regularly check its performance with iStat Menus and App Tamer.

Running Apple Diagnostics and optimizing performance with CleanMyMac X, iStat Menus, and App Tamer prolongs the life of your Mac. These three apps are free for 7 days on Setapp, the curated suite of best productivity apps — so you can try them all to make your Mac fly.

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To an average computer user, any challenge with the hardware or even software warrants the need of a technician. This need not be the case and as a matter of fact, it is quite easy to troubleshoot some of the common problems that your PC might be facing.


Especially with some of the hardware diagnostic software that we will be discussing, you can be sure that the trips to the technician will be lessened considerably.

PC Doctor

PC Doctor is a health solution for computer systems and will ensure that all the hardware aspects of your computer are running appropriately as well as intelligent messaging and proactive system monitoring. With the tool, you will be able to serve a vast majority of users in Windows OS as well as Android including Marshmallow 6.0.

HP PC Hardware Diagnostics

HP PC Hardware Diagnostics tool comes installed to all the latest machines manufactured by HP. It is inbuilt and in the BIOS and thus you do not need an OS so as to gain access to it, and this implies that even when you OS has failed, you are still able to do diagnostics.

Pc-Check – Computer Hardware Diagnostic Software

Pc-Check-Computer Hardware Diagnostic Software is a tool that has a wide range of applications in reporting on the hardware status of the computer. It is an ideal tool for use by manufacturers, computer refurbishing companies, repair centers, and even for a hobbyist. It is reliable and a solution that is easy to use.

Other Platform

Hardware diagnostic softwares are very particular when it comes to the platform they will ride on. As much as the developer of the software can be in a position to develop one for the other platforms, it is not an easy task. Especially for PC and Mac, the ridge is too wide and obviously conspicuous.

Download Apple Hardware Test

Hardware Diagnostic Software For Windows – BurnIn Test

BurnIn Test is a hardware diagnostic tool that enables the major hardware components of a computer system to be tested for stresses. This is used to determine the reliability, endurance, and stability of the system. The tool is ideal for conducting diagnostics and troublesahoots and also helps to avoid dead machine to clients.

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. With this software, you will be able to get back up to what you were working on fast.

Hardware Diagnostic Software for Android – Phone Tester (hardware info)

Phone Tester (hardware info) is an Android based hardware diagnostic tool. It gives you the status and condition of the components of your device. With this, you are able to get details on the components such as WIFI, battery, Network adapters, Bluetooth devices, major sensors, touch screen and many others.

Most Popular Software for 2016 – EVEREST Ultimate Edition – PC Diagnostics

EVEREST Ultimate Edition is a computer diagnostic tool that gives you the ability to view all the information of the components installed on the computer. This is the PC diagnostics software utility that assists you while installing, optimizing or troubleshooting. At the same time, it is also possible to get the drivers that are installed on your system.

What is a Hardware Diagnostic Hardware?

A hardware diagnostic software is a tool that is able to troubleshoot the errors in the hardware of a computer system. From this, it can give a report that can help in averting a bigger risk or even for the purposes of general information.You may also see Driver Manager Software

These tools are very essential especially when it comes to handling multiple computers as they are key in ensuring that minimal time is spent especially in manufacturing, refurbishing and repair companies. With some of the tools, there is enhanced performance, and they form an ideal companion for home users who may be interested in the health status of their computers.You may also see Disk Cleaner Software

We have been in a position to view some of the best soft wares that are available in the market in the category of hardware diagnostic. It is impressive to find that there are tools even for the mobile platforms, and this indicates how important these type of softwares are.

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