+1 for Alfred, but honestly I feel lost on any mac that doesn't have Spectacle installed. I know this might be a character flaw - but I physically cringe when someone spends 10 seconds using their mouse to rearrange window size.
As I said, I think the best way to navigate around a mac is by using spaces (built in fullscreen)
I literally never use any app in windowed mode.
But most of my co-workers do use spectacle so I can definitely agree it works for most people!
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