An annoying and random bug for trackpad users on Mac
This bug blocking the operation of the zoom (accessible by spreading two fingers on the surface of the trackpad of a MacBook or on the Magic Trackpad) is random and seems to particularly affect Apple applications, such as Safari, Preview, or Maps. Among the most effective solutions, while waiting for a possible macOS patch, it is possible to disable/re-enable the Zoom in or out option within the tab Scroll and Zoom
you menu Trackpad
of the System Settings
or type the command killall Dock
within the Terminal in order to relaunch the dock, which has the effect of restoring the functioning of the zoom to the trackpad.
Pinch: a quick solution accessible via the menu bar
For those allergic to the Terminal, it will also be possible to install the Pinch utility (open-source and available on this GitHub page) from developer Dan Liu. The software is housed in the menu bar and allows you to launch the command with a single click when the bug occurs. However, it remains a shame to find this type of bug quite disturbing on a daily basis on the last two versions of macOS. Do not hesitate to tell us if you frequently encounter this bug and your possible solutions in the comments below.
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