Apple Diagnostics shows a progress bar while it's checking your Mac: When testing is complete, Apple Diagnostics shows the results, including one or more reference codes. Learn about Apple Diagnostics reference codes. To repeat the test, click “Run the test again” or press Command-R. To restart your Mac, click Restart or press R. Doing so can solve certain app-related problems, speed up your Mac or simply free up disk space. This doesn’t mean you should summarily delete files here. I generally wouldn’t do so without. Answer: Launch the Settings app on your iOS device and then navigate to General then About. Look for Diagnostics & Usage (at the bottom) and tap it. Then select 'Don't Send' to disable the option to send Diagnostics & Usage reports to Apple.
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.
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.
Running a hardware test on Mac may seem like a complicated process, but believe us — that's not:
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.
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:
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.
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:
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:
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:
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.
There's even more you can achieve with running a diagnostics — if you have the right tools for it. Conduct an advanced system testing and optimization that will secure and speed up your Mac with an app like MacPilot.This powerful utility unlocks over 1200 hidden features that go beyond standard Mac settings.
It allows you to improve system performance by running executables, emptying trash, resetting DNS cache, clearing print queue, and more Best of all, it's all done automatically. You don't even need to know what that all means — let the MacPilot app do the job for you.
MacPilot checks and boosts the productivity of your Mac on a daily, weekly, or monthly basis. Small changes make a big difference. To optimize Mac with MacPilot:
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 and MacPilot 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 and easily fix any issues in no time.
Running Apple Diagnostics and then optimizing performance with CleanMyMac X and MacPilot is a winning combo that prolongs the life of your Mac. Both apps are free for 7 days on Setapp, the curated suite of best productivity apps — so you can try both of them to make your Mac fly.