Mojave S.M.A.R.T. Status

Now that I have my new 2018 iMac pretty much setup I have been doing some exploring. One of the things I did was to run some utilities on the machine just out of curiosity. When I ran the Disk Utility App I noted that the S.M.A.R.T. status for the iMac internal SSD drive indicated “Not Supported”. Really? There is not a way to check the S.M.A.R.T. status on my new iMac?

S.M.A.R.T. Status

Operating systems and hard drives have had S.M.A.R.T. status implemented for a long time. What is S.M.A.R.T. status?

S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology; often written as S.M.A.R.T.) is a monitoring system included in computer hard disk drives (HDDs), solid-state drives (SSDs),[1] and eMMC drives. Its primary function is to detect and report various indicators of drive reliability with the intent of anticipating imminent hardware failures.

S.M.A.R.T. status has not always been super reliable, but I think it has improved over the years. 

Here is what Disk Utility reported when I checked my internal SSD on my new iMac:

SMART status

This made me a little concerned. Was there a problem with my new SSD drive, or was my machine just too new for this feature to be checked. I did a bunch research on S.M.A.R.T. status in macOS Mojave to no avail. Then I remembered I had a couple of Apps on my Mac that can check SSD S.M.A.R.T. status. 

I tried the S.M.A.R.T. Utility App first. It reported that the S.M.A.R.T. status of my iMac SSD Passed, it was OK:

SMART Utility

That was very encouraging. Then I remembered I had DriveDx in my Applications folder as well. DriveDx checks on more stuff than S.M.A.R.T. Utility, but it checks S.M.A.R.T. status as well:

DriveDx Report

If you look closely you will see that S.M.A.R.T. support is “Enabled”. The SSD is setup to provide S.M.A.R.T. support, but either Disk Utility or MacOS Mojave 10.14.4 is not capable of reading it. Perhaps it will read it by the time we get to macOS 10.15.


I really did not expect to find any problems with the new iMac when running these utility Apps. The machine seems to be running wonderfully. I have not had any issues at all. I guess time will tell if macOS Mojave will report S.M.A.R.T. status on this machine.