I have a Mac pro from mid 2012. I recently installed Sierra 10.12.6 on the system. I am now getting new Finder windows for every folder I open. I searched around and the only solutions I have found is to go to Finder preferences and to uncheck the "always open new windows" box, and to make sure that the toolbar is being shown. The toolbar is shown, and the other solution is old, because that check box is now to select whether to open new folders in tabs or windows. I wouldn't mind the tabs, as I could just ignore the tab bar, but when opening folders, it doesn't focus the new tab, so I have to go and select the tab after opening it. It's a pain in the @$$. If I select to open in windows instead of tabs, every folder I open is a new window. I work in a media facility and this is the computer I typically use for our data management and so every time I do anything, I go at least like 7-8 subfolders deep. and closing all of these windows the past week or so is getting really super annoying. Is there any way to force the Finder into just replacing the current window with the folder I am attempting to open? The way it works on literally every other mac I have used for the past 10 or so years?