Finder

K

File Operations
New Finder window⌘N
New Folder⇧⌘N
Open selected item⌘O
Close window⌘W
Get Info⌘I
Duplicate⌘D
Make Alias⌥⌘A
Show original item⌘R
Add to Sidebar⌃T
Eject⌘E
Move to Trash⌘⌫
Empty Trash⇧⌘⌫

View
Show Hidden Files⇧⌘.
As Icons⌘1
As List⌘2
As Columns⌘3
As Gallery⌘4
Open Quick Look⌘Y
Hide/Show Toolbar⌥⌘T
Hide/Show Sidebar⌥⌘S
Hide/Show Preview pane⇧⌘P
Hide/Show Status bar⌘/
Hide/Show Path bar⌥⌘P
Hide/Show Tab bar⌥⌘T
Increase size of icons
Decrease size of icons⌘-