I have one other question. If the PDF is not open, then why should I not be able to delete it, regardless of whether or not the Preview app is running? In the past, I thought this was possible, at least most of the time, but now it seems that it hardly ever (if ever) is possible.
Gregg On Jul 7, 2012, at 5:36 PM, Charles Dyer wrote: > 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
