How to type brackets, braces, pipe, backslash, or at sign on OSX

On OSX (real or inside Browserstack), you need different keystrokes for your favorite special characters than you'd use on Linux or Windows.

Character OSX Keystroke
[ Alt+5
] Alt+6
{ Alt+8
} Alt+9
` ` (Pipe)
\ (Backslash) Alt+Shift+7
@ Alt+L
Arne Hartherz