Reloaded Lightroom 6.3 and icon is set to "keep in the dock". Program is quitting whenever I close the window?
I don't know if LR for Mac is supposed to do that but some programs are programmed to do that. So if you are clicking the red X icon to close the LR window just click the - icon to minimize it to the Dock.
"Keep in the Dock" and closing the LR window are 2 different actions. "Keep in the Dock" means that even if LR is closed, the LR Icon is still in the dock for reopening. If you want to keep LR open, don't close the window. You can minimize LR as suggested above, or you can "Hide LR from the LR Menu. Keyboard shortcut Cmd + H