> Shift key goes solo

Since updating to macOS 10.12.6, the Shift key on my Apple wireless keyboard misbehaves with other modifier keys in Adobe apps. For example, holding Opt and Shift while trying to draw a square from the center out in Photoshop behaves as if only one key is being held, not both. This applies to both of my keyboards, wireless or cabled. What’s wrong?

If the rest of the Sierra update went fine, and you have no other glitches, this probably results from a driver or other extension, and has been reported with Wacom graphics tablets.

A good test would be to disable third-party extensions by starting your Mac in safe mode – see the end of this section for more information and full instructions on Apple’s site – but that may make it impossible to use those apps, too. If you can use the apps in safe mode, test to see if the problem occurs there. If it disappears, investigate recently installed drivers.

If necessary, download earlier and later versions of the driver, and see whether either makes any difference. You may find that the previous version does the trick. If you’re thinking of upgrading to macOS High Sierra, head to Wacom’s driver download page ( bit.ly/ wacom drv) for the latest updates.