Any good memory test for newer Macs (2015 and later) [closed]

I'd like to be able to test memory thoroughly in Macs (2015 and later, for older Macs I use Apple ASD tests). I tried Memtest but it won't boot from a thumbdrive for some reason.

Solution 1:

Use Apple Diagnostics. Its an Apple-approved method of checking your memory and other hardware parts of your Mac. You can restart your Mac, then hold down D as soon as it restarts. If you did it correctly, your computer will either boot into Apple Diagnostics or Apple Hardware Test, depending on the age of your machine. Then just follow the prompts.

Solution 2:

You probably didn't set up Memtest properly. Here is how:

Check Your Memory Using MemTest86

If you want to learn more about any problems Apple’s diagnostics detected, or you want to run another test for peace of mind, MemTest86 is one of the best tools for the job. There are a few memory testing tools that use similar names, but MemTest86 is still regularly maintained and updated.

To test your machine, you’re going to need to make a bootable USB drive from which to run the test. The first step is to find a suitable USB drive and make sure there are no important files on there since the whole drive will be erased. Insert the USB drive into a free port.

Now download the free drive creation tool Etcher, mount the DMG, and install it to your Applications folder. Head to the MemTest86 Downloads page and grab the Image for creating bootable USB Drive under Linux/Mac Downloads.

Once MemTest86 has downloaded, extract the archive and launch Etcher. Click Select image, navigate to the extracted archive you previously downloaded, and choose the memtest-usb.img file. Now click Select drive and choose the USB drive you want to use. When you’re ready, click Flash! and wait for the process to complete.

Next, shut down the Mac you want to test and insert the USB drive you just created. Press and hold the Option key and power on your Mac. When prompted, select the external drive you created (it may show up as EFI Boot) by clicking the arrow to boot into MemTest. Don’t select Macintosh HD, since this is your internal drive.

Wait for MemTest86 to initialize. Testing should begin after a short pause, but if it doesn’t, select Config then Start Test. Allow time for the test to complete; it took around 40 minutes on our test machine. In the end, you’ll be given a summary, and an option to save a report to the USB drive in HTML format.

Save the report if you find anything unusual and use it to seek help from an Apple technician or Apple Support.