Mac OS X
Q: How do I turn off the trackpad when using a mouse?
Often, while using a mouse on my MacBook Air, the cursor will jump to a strange location, thus I am typing in an inappropriate place causing confusion as to where I am in an email, document, or other application. Is there a way to stop this from happening? It is very annoying. I think it's caused by a Trackpad issue.
MacBook Air, Mac OS X (10.7.5), 1.6 GHz Intel Core i5, 2GB
Posted on Nov 28, 2012 9:08 AM
by citywalks,Apple recommended
I know this is an old question however this is the answer.
OS X EL Capitan
Go to system preferences> Accessibility
Check "Ignore built-in trackpad when mouse or wireless trackpad is present"
Posted on Jan 30, 2016 1:37 AM