for more convenience, you had connected an external mouse to your macbook. unfortunately, something went wrong, and you can’t use your mouse and trackpad at the same time on your macbook pro/air. hold on! there is needless to worry about it as you can easily get rid of the issue.speaking the truth, i had been in this situation before.  the built-in internal trackpad seemed to completely stop working when i paired my bluetooth mouse with the notebook. initially, i thought it was due to a bug but soon discovered that macos offers a straightforward way to use mouse and trackpad at the same time.sponsored linksone thing worth mentioning is that this feature works for all macbook pro, macbook air and macbook models that have the support for external tracking devices like the trackpad, bluetooth or usb.step #1. first off, click on apple menu at the top left corner of the screen → click on system preferences.sponsored linksstep #2.  select accessibility.step #3. next, you need to click on mouse & trackpad from the accessibility sidebar.step #4. finally, uncheck the box next to “ignore built-in trackpad when a mouse or wireless trackpad is present.”moving ahead, you will no longer have any problem in using mouse and trackpad at a time.over to youmacos high sierra hasn’t got as much appreciation as apple would like due mainly to several bugs like the one that allowed full admin access without a password. hopefully, the next-gen macos is more stable than the existing one. w...