See how long mac has been on

With my 1. Because of this, the hard disk might actually be awake even though the computer is not being used, thereby skewing the power-on figure from our perspective. Note that this setting is a firmware value within the disk itself, so will not be affected by any reinstallation of the operating system. Just open a Terminal window as described above and paste in the following:. Then look at the date listed in the output, approximately in the middle of the line.

Do you know of any other clever trick for working out how much a Mac has been used? You point out that it resets some counts by the Mac related to these metrics you detail — Like hard disk, power-on hours, also reset too?

Good point Smith Jeffrey. My daughter and I had our MacBook Pro batteries replaced within a couple of months of each other about 3 years ago, and I happened to look at both of them with CoconutBattery recently. My daughter, a student, runs hers on the battery much more often. I read this article because I am in the market for a used MacMini. Probably the best I can do, assuming it works OK, is a visual inspection for signs of it being dropped. Has it been used for maybe an hour a week? Or has it been used each day?

October 11, at pm. April 4, at am. March 2, at am. April 3, at pm. Aimad says:. August 23, at pm. Naki says:. April 12, at pm. OSXDaily says:. June 9, at am. July 14, at am. Screensaver not working in Mac OS X? Fix ScreenSaverEngine. December 21, at pm. CaptSaltyJack says:. September 22, at am. Leave a Reply Click here to cancel reply. Get Gmail Push Notifications on the iPhone ». Shop on Amazon. Subscribe to OSXDaily. Follow OSXDaily. News - Beta 2 of iOS This website and third-party tools use cookies for functional, analytical, and advertising purposes.

By continuing to browse the site, closing this banner, scrolling this webpage, or clicking a link, you agree to these cookies. You should be greeted with dozens of entries that provide you with the exact dates and times pertaining to each and every reboot, be it manual or automatic due to a system error.

Again, you will get a list of the last couple of shutdowns—be it manual or automatic, performed by the system—along with their exact dates and times. As someone who up until recently used to work long nights, this command was very helpful in determining how late I worked. Got stuck?