fix typo in running-on-osx.md
MODIFY
docs/en/appium-setup/running-on-osx.md
docs/en/appium-setup/running-on-osx.md
@@ -25,7 +25,7 @@ Appium on OS X supports iOS and Android testing.
Otherwise, Appium won't know which one to use.
* In iOS 8, devices each have their own setting which enables or disables
UIAutomation. It lives in a "Developer" view in the Settings app. You need to
- verify that UIAutomaion is enabled in this view before the simulator or
+ verify that UIAutomation is enabled in this view before the simulator or
device can be automated.
### Authorizing iOS on the computer

fix typo in running-on-osx.md