Safari on macOS High Sierra has been found to use much less memory than on previous versions of Apple’s desktop operating system, according to Kirk McElhearn.

Using the iStat Menus app to measure RAM consumption under macOS High Sierra, McElhearn has discovered (via The Loop) that Safari’s memory usage has dropped “a great deal” from earlier macOS releases.

“Right now, with my iMac running for more than four days, Safari is only using about 3 GB of RAM. And this with more than a dozen tabs open,” he wrote. Previously, the browser would be using 5,6, even 8 or 9 GB of memory, McElhearn said.

“I would have to quit it every few days to get it to stop being sluggish,” he added.

I’ve noticed the same thing on my mid-2013 MacBook Air with 4GB of RAM.

Before macOS High Sierra, Safari would slow down my computer with more than two-dozen tabs open. macOS high Sierra makes my machine noticeable snappier under high load, a much-needed improvement that I chalked up to under-the-hood optimizations.

And because any improvement in memory usage makes Safari and the whole computer run faster, this also has a positive effect on battery life.

Have you noticed the same thing on your setup?

Let us know by posting a comment below.

  • Iskren Donev

    I am super happy that this issue is being resolved.

    I have a MacBook Air as well with 4GB of RAM and Safari would destroy it in no time. That’s not even the worst of it. As the RAM pool dried out macOS would start caching on disk. However since Safari is such a hog it would keep reading and writing constantly. Once I noticed that the kernel_task process had written 1TB of data to disk in a week. This is staggering to me and it sure had a negative impact on the lifespan of the SSD.

    I have not yet had enough time to put macOS High Sierra through its paces but hopefully things have improved.

  • Susie

    Pretty hard not to notice… before the update to High Sierra (running 2 27″ monitors from my MacBook Pro) I’d have to constantly quit and restart Safari and I’d also be using Vivaldi and maybe Chrome too (although Chrome sucks now, memory hog and those auto play videos drive me insane). I finally made Safari my default browser because it has been so stable after the update that I rarely even open Vivaldi anymore. I can have 30 tabs open and won’t have to restart like I used to, that coupled with the ability to shut off the auto playing videos makes it a winner.

  • 6-9Gb ?

  • Scott

    I cycle between Windows (work) and Mac/IOS at home…if Apple would make a current Safari for the PC platform I might care, until then it doesn’t matter.

    • Hieu Bui

      It wont be that efficient on Windows

  • So Young

    High Sierra brings me more problems than improvements so far.Still waiting for a fix for “verifying” bug every time I try to open a video.

  • aardman

    Been searching for a solution because my 2 day old iMac has Safari eating up 33 GB of memory in just an hour of use. And I’m not opening multiple windows, just 3-5 tops.