I couldn’t find a way to do this, but there are several utilities that will do it for you like this:
Not that I can find. But, perhaps depending on the app, you can just double click on the top bar. At least that’s what happens in Chrome for me.
The double-click or option/green button only works for some applications. So, it’s hit or miss on how it will work. It would be nice if Apple brought back the previous green button use as an option.
Thanks, but that does the exact opposite of what I want. I’m trying to restore the classic conventional MacOS behavior of zooming (not maximizing) the window when I hit the green button.
What about this?
This does take me back to my days with a P.C.
It appears that there is NO RAM left for actual activity. I’m kinda eager to find a way to see exactly how much RAM is in use, how much is left and what is sucking up so much of it.
I am getting mighty tired of that fucking rainbow spinning circle of hell… stooooopid Sierra.
It’s SO slow that when I try to open up System Preferences, it is Unresponsive and doesn’t load.
Activity Monitor will show you how much “Memory Pressure” there is.
Where would I find such a thing?
Oops. Got it. 
Hmmm. There’s very little load on the RAM. Cannot imagine what is causing the amazing lag.
Ah. The thing using the most resources is something called " BDLDaemon ". It’s using 5 Gigs of my 8 Gigs of RAM available !! :eek:
A bug?
I sympathize that something is going badly wrong for you, but obviously it is not a feature of Sierra that it generally behaves the way you describe. I have Sierra installed on 3 machines of varied vintage - the upgrades went without a hitch and I haven’t had any problem with storage, performance or stability.
Why a recommend against using AV on OS X:
Apparently this is a BitDefender Anti Virus package issue..
Odd that it coincided with my upgrade to Sierra to really show how much it slows down the machine.
The work-arounds / fixes may be a bit beyond my comfort level with my Mac, but I cannot see ditching the software. And of course I cannot have my machine with 95% of its RAM eaten up by an anti-virus running nonstop…
Personally, I’d ditch it. I have five Macs in the house. Been running them since 2005? Not one issue with viruses on any of them. I’ve twice ran anti-virus software as a one-off just to see what’s going on, and all it found was Windows viruses sent as attachments. And I used to surf the types of sites where malware would be expected. Yeah, I know, Macs aren’t 100% immune to viruses and all that happy horseshit (and I know they are not), but it’s never been an issue for me or any Mac user I know.
+1
According to your link, it’s eating your CPU cycles, not your RAM.
As everyone else is saying, ditch the AV stuff.