Just to the left of the Spotlight icon in the menubar is the icon which tells you which app is active. If you click on it, the menu will drop down showing which apps you can click on to open another app window.
Not on this Mac. The time (and date, hidden) occupy that spot. None of the other icons up there reveal the running apps either. I looked real quick for the preference panel(?) that lets you customize the menu, but didn't see it. I'll take more time to look later.
Uhh, I'm not sure if it's changed on Leopard, but in Tiger and Panther, there are little black triangles either underneath or to the side of the application icons on the dock, depending on where your dock is located.
Not on this Mac. My Dock is on the right side (yours being on the wrong side) and hidden unless I request its appearance. No little triangles anywhere.
For some reason many users never use one of the most useful app switching function built into the OS. Hold the command-key down and tap the tab key (don't hold the tab key down, but keep holding the command key). You will now see a list of all running apps. Tapping the tab key will now take you, sequentially, to each app, from left to right. Add the shift key, and you can go in the other direction. Stopping on any app's icon will bring that app "to the front." But when that app's icon is highlighted, at least the "Quit" command is available. Remember, you still have the command key down, so all you need to do is also press the "Q" key to Quit that app.
That is cool! I'll have to remember that one.
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Of course, the Dock also shows what apps are running, if you make it visible.
And how is that? My Dock doesn't show any difference in Icons of apps that are running vs. icons that I put there to have quick access to. Other than the latter, when an app is opened, its icon appears in the Dock and I recognize it as a "visitor" rather than a "resident" icon.
Well, by gosh, I never used that one Jim, and just did it, and I that's much better than perusing the dock for the little black triangles!
That's why someone has to ask the basic questions around here.
To really know what is currently running, one must access Applications/Utilities/Activity Monitor.
Not sure I need to know that, but just how does one "access" Activity Monitor? Go there and double click the icon? Really, I just want to see the ones I have/had running on purpose.