The idea is that you should never have to quit an app. You just run apps, any apps, all the apps you want. When you run low on RAM, the system will autoquit whatever apps are necessary to free up enough RAM for what you're doing, and will pick 'unused' or at least not recently used apps to quit. You don't have to worry your pretty little head about keeping track of which apps are running, Apple will handle all that for you. That's why it's now an option to have a little light under the app icon in the Dock; Apple doesn't want you to have apps permanently in the Dock, apps should just be freely able to come and go without user attention.
You can see the different items in Activity Monitor by going to View/Columns and selecting the column you want to see. On 07 Jul 2012, at 17:12 , "Dinse, Gregg (NIH/NIEHS) [V]" <[email protected]> wrote: > Hi Charles, > > Thanks for the information. I had not heard of "sudden termination" but > after reading your message, I googled it. Apparently it was also around in > Snow Leopard, though I certainly never noticed a running app's icon > disappearing from the dock until very recently (and I upgraded to Lion > recently). > > I wonder what the advantage is to having a running app's icon disappear from > the dock? > > By the way, I looked in the Activity Monitor, but I was not sure how to tell > which applications were subject to sudden termination. Is there a special > flag or something? > > The work-around of never deleting PDFs does not sound very appealing (I > assume you were joking). Perhaps I should assign Adobe Acrobat as the > default PDF viewer to avoid this problem with Preview. > > Thanks again for the help, > > Gregg > > On Jul 7, 2012, at 4:52 PM, Charles Dyer wrote: > >> If you are running Lion or later, it's because Apple thinks that they are >> smarter than you are. There is a new for Lion feature named 'Sudden >> Termination', and most Apple apps (including Preview) are rigged for it. >> Basically, if you have an app which can be Suddenly Terminated (and you can >> tell which ones by firing up Activity Monitor and having a look) then, if >> that app has been running for a while (and no, I don't know how long 'a >> while' is, I haven't experimented) without significant activity (and no, I >> don't know what Apple considers 'significant activity') then the system will >> terminate it without asking you. Unfortunately sometimes it terminates the >> app without notifying all concerned; this means that the icon vanishes from >> the Dock, or if it's permanently there, the 'app is in use' light will go >> away. However, some things, such as the Trash, don't get the message. >> >> Work-around: don't put things into the Trash which are in use from an app >> which can be Suddenly Terminated. Other work-around: don't use apps which >> can be Suddenly Terminated. >> >> On 07 Jul 2012, at 16:35 , "Dinse, Gregg (NIH/NIEHS) [V]" >> <[email protected]> wrote: >> >>> Hi, >>> >>> A week or so ago, I wrote to ask why I could not empty the trash. Usually >>> the culprit is a PDF and usually I can quit the Preview app and then the >>> trash will empty. This did not appear to be the case recently, though at >>> least part of the problem turns out to be that the Preview app was still >>> running but its icon was not in the Dock, so I did not realize it was still >>> running (and thus I did not quit it). >>> >>> So the new question of the day is: Why does the Preview app disappear from >>> my Dock when it is still running? >>> >>> I have not investigated much, but if I double-click on a PDF while Preview >>> is not running, then Preview starts up and its icon shows up in the Dock, >>> but at some point (I don't know when or why), the icon disappears from the >>> Dock. >>> >>> By the way, I discovered that Preview was still running by using the What's >>> Keeping Me app that someone suggested. Thanks for that suggestion! >>> >>> And thanks in advance for any information about my latest question. >>> >>> Gregg > _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
