re-enable mouse scroll inertia in Sierra In previous versions of macOS (OSX), when I scrolled fast, the page woule keep sliding a bit, as if there was some inertia keeping it moving. This seems to have been disabled in Sierra, and I can't find the setting to re-enable it.
I found the setting in System Preferences > Accessibility > Mouse &amp; Trackpad > Trackpad Options.

It was enabled, and disabling it and re-enabling fixed the issue for me.