After installing Mountain Lion on my Imac, volume keys and scroll function are disabled.

I just installed Mountain Lion on my 2 year old Imac and now the keyboard volume controls don't work and the scroll function on my magic mouse has stopped as well. All these were working fine until the install. I have seen other posts of people having the same problem but haven't seen any definite solutions yet. Really annoying "benefit" to upgrading.

For the mouse scrolling issue, check the setting in System Preferences > Accessibility > Mouse & Trackpad > Mouse options... button > check Scrolling.

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