Terminal "Uptime" command result seems incorrect on my Mac mini after latest macOS Sonoma update.

Hi,

After I upgraded to Sonoma 14.4, the output from the Terminal "uptime" command seems incorrect. Attached is a terminal session in which I first ran the "date" command to get the current date and time; then the "uptime" command to get the system uptime; and finally the "last reboot" command; to list the date and time of the last system boot. Since the last boot time was at 21:49 on March 7th, and I executed these commands in the morning of March 10th, I would have expected that the "uptime" results would have reported a system uptime of about 2 1/2 days, but instead, it's reporting an uptime of 23 hours, 24 minutes. This reported uptime seems random, as it's not consistent with, for example, the number of full uptime days being missing from the "uptime" report. I've used the "uptime" command often in the past to monitor my system uptime, so I'm familiar with its use, but I've never seen anything like this before. I tried rebooting my system, but that didn't fix the problem. Am I doing something wrong here, or might this be some sort of bug?

Thanks!

Ken

[Re-Titled by Moderator]

Mac mini, OS X 10.11

Posted on Mar 10, 2024 10:04 PM

Top-ranking reply

Kenneth Hjulstrom Author

Level 2

478 points

Posted on Mar 19, 2024 9:17 AM

Until this is fixed, I found that the following Terminal command to get the correct non-sleep-adjusted uptime is more convenient than the documented "Apple Menu Item > System Settings > General > About > System Report > Software":

system_profiler SPSoftwareDataType -detailLevel mini

The up-arrow key can be used to recall this command in a newly-opened Terminal window.

Ken

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20 replies

Apr 19, 2024 9:12 PM in response to Kenneth Hjulstrom

I just upgrade to Sonoma (14.4.1) in the last month and when I went to check the 'uptime' using terminal, it constantly says 2 days, even through I'm sure it has been more than that. However, using the command in all caps "UPTIME", does return the proper information (about 12 days). So, semi-solution is to try the uptime command in all caps to get quick info until the lowercase command is fixed.

Mar 11, 2024 11:46 AM in response to Owl-53

Thanks, but could you run the same commands after your machine has been up for over 24 hours? I have a feeling that the "uptime" display doesn't become corrupted until after 24 hours of machine uptime.

Thanks,

Ken

Mar 16, 2024 1:46 PM in response to WirelessWAW

Hi WirelessWAW,

Thanks for the info. Since I'm seeing this on my Intel-based 2018 Mac Mini and you're seeing it on an M1 Mac, this proves that the behavior isn't processor related, and is only contained in the operating system software.

Ken

Owl-53

Level 10

103,507 points

Mar 11, 2024 1:53 AM in response to Kenneth Hjulstrom

All the dates and times look normal as per my memory and usage of this machine

The March 8 sequence was during the Updated of Sonoma 14.4 from version 14.3.1

Apr 13, 2024 6:05 AM in response to Kenneth Hjulstrom

I also experience these irregularities with the uptime command. I'm on an M3 MBP with Sonoma 14.4.1

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Terminal "Uptime" command result seems incorrect on my Mac mini after latest macOS Sonoma update.