Trackpad

Go to: Apple menu > System Preferences > Trackpad > Point & Click

For contextual menu for selected files or folders in a Finder window select:

Secondary click; click or tap with two fingers:

& to open files or folders select with one gesture, select:

Tap to click; Tap with one finger:

You can double-click to open files and folders in Finder without the need for a secondary ('right') click. As far as I'm aware there is no way of opening items with a single click or tap.

As above:

To open files or folders select with one gesture, select:

Tap to click; Tap with one finger.

Please ignore my first reply,

setting: Tap to click; Tap with one finger

will require a double tap on the trackpad to open any folders or files.

Sorry, my initial reply response was wrong.

You are correct, it does require a double tap with one finger to open folders & files.

I have got used to this setting & do not notice the double taps.

I should have also checked both machines before replying.

Apologies for any confusion.

Glad that works for you - it doesn't for me. On my machine (2018 MacBook Pro 15" running OS X 10.14.4), a single click or tap in Finder selects a file or folder but does not open it.

If that were possible, and it it isn't, then you wouldn't be able select anything without it opening.

No worries 😀