I don't know what this person is talking about... maybe it's another version of OSX. On mine, you get this effect by pushing up arrow... you don't have to stop cmd-tab or do anything else, just hit up arrow and it shows you that window. not what you want? keep going with cmd-tab.<p>Once you've hit up arrow, it's like a mode switch, now you are in app window switching mode. Use use tilde (on english keyboards) instead of tab, and it will switch apps in this mode.<p>go back to tab, and you are back to icon switch mode.<p>This is on 10.11.6 anyway.<p>Edit:
Oh, and while just playing around now, it appears instead of up arrow, you can hit cmd-1. So single handed, no gyrations.<p>CMD-TAB to bring up the icon switcher. Hit 1 while holding CMD, switch to window switcher. Hit Tilde while holding cmd, to switch apps in window switcher.<p>Edit2:
It has its flaws. Doesn't show "full screen" apps, doesn't seem to work if you are viewing a full screen app.<p>I always stick with cmd-tab anyway, and for windowing I use BetterSnapTool. OSX needs a lot of help for that.