[tomp]

> - Pressing enter renames a file rather than opens it. What?

Press space instead... mostly will "open" the file (preview it).

[pmx]

cmd and down arrow to actually open it. I'm used to it now but it still annoys me!

[m463]

I always use cmd-o - never knew about cmd-down - it seems to do the same thing - why a different keystroke?

[qubitcoder]

Same here. I just learned about Cmd+down today after using macOS for nearly two decades. I've always used Cmd+o (as in, "open").

But it makes sense. Especially when considering that an Application on macOS is basically a folder (e.g. right click on an app, and select "Show Package Contents"), so navigating "down" into an app would open it.