I upgraded to OS X Mountain Lion from Snow Leopard and all of a sudden my scrolls in the browser window (chrome, Firefox etc) have reversed.

I need to scroll up to go down and vice-versa. Is there a way to change the direction ?

  • You should try to get used to the "natural" scrolling direction. I've found it to be considerably nicer than the old way.
    – Cajunluke
    Aug 14, 2012 at 19:11
  • I can't scroll on a computer with non "natural" anymore. It's so odd. Btw. This came with Lion.
    – Hoshts
    Aug 14, 2012 at 19:29
  • Did you update from Lion? The direction reversal was introduced in Lion.
    – lhf
    Aug 14, 2012 at 19:32
  • Let's leave both - this can cover people looking for 10.6 -> 10.8 and the other for 10.6 -> 10.7 upgrades. It's not logical to expect someone to know to ask about the previous version of the OS or when a change happened.
    – bmike
    Aug 16, 2012 at 14:53

4 Answers 4


You can change this in "System Preferences" -> "Mouse"

enter image description here

This change actually happened from Snow Leopard to Lion with the introduction of Natural Scrolling to match iOS scrolling behavior where the motion is expected to work on the content - not the scroll indicator - as the two move in opposite directions.


The system preference for scroll direction is all-or-nothing and applies to every input device uniformly. With some things, this just doesn't make sense. If you want fine-grained control of which input devices scroll in which way (for example, if you want touchpads to use the "natural" scrolling while having the scroll wheel use traditional scrolling), try ScrollReverser.

  • Unf. for me, treats the Magic Mouse and conventional scrollwheel mouse both as "mouse"; had hoped I could set things up device by device. Otherwise a very nice find (+1, etc).
    – ruffin
    Jan 25, 2014 at 15:13

You need to go to System Preferences icon on the Dock, then mouse in Hardware category, then scroll direction. The description could be different because I have it in Spanish that I am translating, but you need to un-check it anyway, it worked for me.


In System Preferences, go to Mouse and on the Point & Click tab ensure Scroll direction: natural is disabled

enter image description here

  • I see, I was confused by that option, I thought I was enabling scrolling instead of inverting the mouse. Thanks.
    – Caimen
    Mar 13, 2013 at 20:48
  • 1
    Just remember, this way is the standard way now, on Macs. Things change ;)
    – stuffe
    Mar 13, 2013 at 22:39

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