Multi-tasking

It is somewhat ironic that I would praise Apple for the multi-tasking capabilities built into OS X, given that the Mac OS trailed Windows in its support for preemptive multi-tasking. Needless to say, the mistakes of yesterday are not true of OS X today, and its multi-tasking prowess was my biggest draw to it.

Multi-tasking under OS X works just like it would under Windows; you have multiple applications open, some of them doing things concurrently, while others are waiting for your input. I will address the two types of applications in a multi-tasking scenario separately.

In the case of applications running at the same time while performing tasks concurrently, OS X does one thing very well that Windows does not - the foreground application is never intruded upon by any other application that's running. Say you're encoding a video and typing a document in Word, should a dialog box popup in the encoding application, it will do it without shifting the window focus to that application. Instead, the dialog box will pop up in the background and you're free to dismiss it when you're ready and willing. It is all too often that Windows left me annoyed by a dialog box taking focus while I was typing a message to someone online or writing a document.

OS X has been designed to be as unintrusive to the user as possible. For that reason, one of the basics of the Windows interface is not echoed in OS X. While double-clicking a file or folder will open the item, hitting "enter" when one is highlighted will not cause the same effect. Instead, if you hit "enter" on a highlighted item, you'll be able to rename the item. In order to launch the file or open the folder via keyboard, you have to hit Command-Down Arrow (Command-Up Arrow will traverse up a folder tree). This takes a bit of getting used to and if approached with an open mind, you can get used to it in a couple of days, but it can be frustrating at first - especially if you are a keyboard addict used to Windows.

Another way in which OS X allows for less intrusive multi-tasking is in its ability to let you close a background window of an application other than the one you're currently working in without shifting focus to that application. Say that I have a browser window open behind a Word document that I'm typing. I can hover over the red close button on the browser window and click it without actually shifting focus away from the Word document - I can continue typing away right after clicking the browser's close button without any additional mouse use.

Next, there is the more frequently used type of multi-tasking, where multiple applications are open and the user switches between them. I've already mentioned that OS X has the equivalent of the Windows ALT-TAB functionality; the task switcher is activated by holding down the Command key and hitting "tab" to sequence through all of the open applications. Releasing Command activates the selected application and everything continues as it would under Windows.



Command-Tab in action. The more applications that you have open, the smaller each icon becomes as the Command-Tab list grows in size.


There is also the equivalent of the taskbar, which in OS X is best likened to the "dock". The dock is a fully customizable bar at the bottom of the OS X desktop (you can position the dock along any side of the screen that you'd like) and it contains application launch icons for applications to which you want quick and easy access, as well as icons of any running applications. If a running application already has its icon in the dock, a little arrow appears under the icon to denote that it's running; if not, the application's launch icon will appear to the right of the dock. The dock does have a divider to which you can also drag folders and links; to the right of this divider is where minimized windows go (with a very nice accompanying animation). Clicking on any application's icon in the dock will either launch the application if it's not already running or it will switch to that application; but, of course, that requires using that pesky mouse.



Finding my way around Finder (continued) Perfect Multi-tasking
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  • vroem - Friday, October 8, 2004 - link

    "Well, to install an application, you simply drag the application's installer to any folder on your hard drive and it's "installed". Doing so actually triggers a number of files to be copied to various places on your drive, but the fact that you are separated from that process, it really made me feel like I wasn't in control of my system."

    You are thinking to much!
    The thing you copy to your disk is the application not an 'installer'. Nothing happens in the background.

    For the windows users: in OS X an application is a "package". For the user it's a file, for the system it's a directory that contains everything to run like dylibs (mac-dlls).

    The application package is not supposed to change. Settings are ONLY created in the right folder in 'Library' in the users home folder. Deleting the relevant settings file resets the program's settings to the defaults.
  • Kishkumen - Friday, October 8, 2004 - link

    #34 - The phrase of the day is "price to performance" ratio. In fact #35 has some good information on the performance part of the equation. www.newegg.com has some good information for the price part of the equation. Look into it. A single Pentium 4 or Athlon 64 seems to perform quite well compared to dual 2.5 PPCs, but you're right, it's not about MHz. Perhaps I should say that Apple uses dual PPCs out of necessity due to IBM's inability to scale performance sufficientely per single PPC chip. In other words, if that's not clear enough, dual Xeon and Opterons are unnecessary for your typical x86 based workstation. Thus, better "price to performance" ratio. Now if you start beating us over the head again with this or that benchmark that the PPC "wins", again, don't forget the price part.

    Now, we have been going back and forth with the CPUs of the different platforms. We haven't even discussed video cards, hard drive performance/cost, cost of proprietary cables, etc. Say it again with me now, just so you don't forget what the argument is about..."price to performance".
  • cosmotic - Friday, October 8, 2004 - link

    37: Moving windows on a Mac is much faster than windows since its all in the GPU. Did you mean resizing?

    38: I all those third party themes (and defualt windows theme) look like crap. They are all afterthoughts. And sorry I cant spell. And as for my feelings, using a G4 400 makes me feel better than using an athlonxp 2500+...

    If your looking for a responsive UI, get BeOS. If your looking for smooth pretty UI, try MacOSX's tripple buffered glory.
  • Boonesmi - Friday, October 8, 2004 - link

    ive used a couple g5's in the last several months. i wasnt disapointed with them at all. but if i had $3000 to waste on a new toy, no way would it be a new g5.

    my main rig is a dual opteron (less then half the cost of a new G5 to put it together) and when switching back and forth between the systems its clear to me that the dual opteron is superior (and not by a small margin)

    granted the apps i run and the work i do arent the same as everyone else... im sure there are situations where a G5 would be better
  • darthlupin - Friday, October 8, 2004 - link

    The one thing that has been missing from the article, and mostly glossed over in the comments is how Mac OS X is really a *nix with a great front end. If you install the "Developer Tools" (which comes with OS X on a separate CD and can also be downloaded), you then have access to GNU tools such as make and gcc, and Perl(though that may be native,) as well as XCode which has plenty of advanced features. That means that you now have access to almost every open source project out there. I guess Anand isn't into that kind of stuff, but any Linux user should appreciate it immediately.

    Once you really get to know it, and I don't mean getting to know Finder / Aqua, but the whole package, OS X really makes Windows look like a toy. (Without meaning any offence to the diehard Windows fans.) Talking about keyboard shortcuts on Mac OS X for 17 pages, (though I do appreciate them highly,) is like talking about the automatic coffe cup holder and reclining leather seats on your Abrams tank. I.e. that's not to say that they don't deserve mention, just that they don't scratch the surface of what you can do with it.

    If you're a Linux person, it's a very short hop to switch to OS X, (a fully functioning X11 can be installed separately,) and the laptops aren't nearly as expensive, (though still much more expensive than the equivalent Dell.)
  • Micah - Friday, October 8, 2004 - link

    I have found that upgrading and maintaining my girlfriend's Mac and getting things (especially hardware) working requires spending 1 of 2 things:

    1) Lots of $$! If you want a part, then Apple surely makes it. It will definitely look cool and work perfectly, but it will also cost 2-4x as much as the equivalent x86 part. Just look at Airport & Airport Extreme base-stations versus a Netgear or Linksys 802.11 wireless router.

    2) Lots of time! In this way, the Mac seems to me a lot like Linux. I think a lot of 3rd party hardware out there works with Mac. Their towers come with PCI slots, for example. However, you still have to find the correct drivers or determine if the drivers are already built-in.

    Just recently we went wireless in our apartment. I had to find a wireless PCI card based on a specific chipset for her Mac. Just like most Anandtech readers, I'm used to calling places and asking them to read product serial numbers to me to make sure that I get just the right model/revision/color/batch/stepping/whatever. However, that's usually a case of performance perfectionism. With the Mac, it was a case of getting the right chipset/revision/firmware or it just doesn't work, period. The only other time I've had to worry about that was with Linux.

    So, I guess that my experiences with upgrading and maintaining the Mac have really soured me on it. Moreover, it has soured my girlfriend on them. She is really tired of having to do lots of research in order to find a non-Apple (read: affordable) piece of hardware that works with her Mac. She wants to be able to pick a box off the shelf at Best Buy and just be ready to go.

    Mac promises ease-of-use, and it truly delivers...if you're willing to pay the big bucks.
  • offtangent - Friday, October 8, 2004 - link

    Flamers ... bear in mind that he did buy this machine, so I dont see why he cant complain about it, if he chooses to.

    As for the barefeats article, demonstrating how the latest 2.5GHz dual-G5s beat the Opterons & Xeons that were released last year is hardly any feat!
  • L1FE - Friday, October 8, 2004 - link

    For bob's sake people, it's not a benchmarking comparison but an editorial on his experience with the OS. And #33 how about you benchmark your "FEAL"ings on Mac since you obviously cared about that from your original complaint. And then you go on to say that it looks better than on a Windows machine when there are so many mods (win blinds) that look just as polished OSX. If I had an unlimited amount of cash, I'd buy a MAC. Until then I'll stick with my cheap PC and upgrade according to my needs. Nice editorial btw.

    P.S. It's FEEL. If you're going to emphasize it, at least spell it correctly.
  • CindyRodriguez - Friday, October 8, 2004 - link

    as for sluggish interfaces and choppy windows resizes... my Athlon 3000+ OC'ed with a Radeon 9800Pro isn't smooth as silk when resizing windows. I think overall, the interface of Windows IS more responsive than OS X but I think boasting that windows takes a half or quarter second less to do something is worth squat at the end of the day.
    Now Fedora Core 2.. on my Athlon, that's how I want OS X to respond.. but i prefer microkernels over monolithic kernels from an architectural standpoint.. and X is dog slow for stuff like moveing windows.

    Also, as for OS X's sluggishness, remember that it's a display PDF interface. You can print ANYTHING out to PDF. You get real alpha channels. You get WYSIWYG output on postscript printers. it may not be as snappy as other OSes but there is a lot of value that replaces those fractions of a second.

    My one big (major) complaint about the Finder is that it is WAY too slow when you are browsing remote AFP directories (or other network volumes, but AFP stands out).. especially over slow links. I'd like to see the Finder recognize slow links and simply list the files/dirs.. and then maybe download custom icons in the background.
  • CU - Friday, October 8, 2004 - link

    OS 9 did not support preemptive mult threading. I think that is what caused multi-tasking to be so slow on OS9. I have used OS9 and it is not something I won't to repeat. I use OSX at work and while it is way better than OX9, I still like XP better. The dock is nothing special. Win98 maybe even 95 I cannot remeber has the quick launch bar that can be put on every side of the screen. You can even have more than one. It will also auto hide. The dock did not impress me but it is so needed for OSX since it lacks any other way to get to application easily. Using Expose to get to your HD and then clicking through folders to get to the application you want to run is so Windows 3.1. The start menu in windows seems to be the best solution so far if you use lots of application. I have also noticed the scrolling issue in Safari that he mentioned. It is very bad on my Powerbook 1.25ghz 1gig of ram. I don't understand how you can have problems having lots of windows open in XP and not OSX. XP can group all like windows together in the taskbar and you can increase the size of the taskbar to have the screen if needed (not very usefull though). It also puts arrows on the side of it so you can view more windows that are open. In OSX the dock just starts getting way to small since that is where your App shortcuts are at also. The dock is already not large enough to hold all the shortcuts I need. Command-H doesn't always help because that hides the app and not just the current window. My Powerbook also crashes more than my PC at home but not by much. But I overclock everything in my PC and run games on it. Anyway it was good read.

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