Want to get down and dirty and find out what kind of traffic is on your network? Well, a packet sniffer is a great tool for this, and OS X has a copy of tcpdump, the open-source packet sniffer program, pre-installed.
Please note three things about tcpdump:
- It's a command line tool so you'll have to use the Terminal. (See the manual (man tcpdump) pages for options.)
- You have to be root to use it (or use sudo)
- It can be used for good or evil. Please make the right choice.
As a networking teacher, it's a great way to show students how insecure their network traffic really is (especially stuff like telnet and ftp).
You may already know that if you drag a URL into the right hand side of the dock, it'll stay there and clicking it opens the page in your chosen browser.
Trouble is, the icon for URLs is generic and unintuitive and you can't change the icon directly. There is a solution...
Instead of dragging the URL straight into the dock, drop it into a suitable folder and the use the standard cut'n'paste method (described in the rest of this article) to swap the icon. Now drag the URL/icon into the right hand side of the dock. Hey presto, you have a custom url with custom icon in the dock. I have an icon of Dilbert that takes me straight to his daily comic strip.
Read the rest of this article if you need a primer on cutting and pasting icons in OS X...
Try the following to maximize the speed of the desktop:
Don't change the opacity of the terminal. [Editor: But it looks SO good!]
Change the dock minimization effect to "scale" by typing defaults write com.apple.dock mineffect scale
Increase the mouse tracking speed and the keyboard repeat rate through the System Preferences application.
Set your colors to thousands, not millions. [Editor: Audion 2.1 looks so much better in millions!]
Increase the priority of the Window Server. This requires root access. First type ps cx and look for the PID of "Window Manager". Now type sudo renice -(number between 20 and 0) (PID of Window Manager). You will be prompted for a password; enter yours (not root's). Take note that as root, a lower number means higher priority; try -5 or -10 as a start. The situation is reversed if you are just doing a renice as user.
So if 'ps' returns the PID of Window Manager as 243, you'd type "sudo renice -10 243" to set set the window manager's priority at -10.NOTE: See the comments for proof that this speed-up is purely pyschological at this point ;-)
PS: Some applications are not threaded properly. A good example is MSIE, it exhibits the exact same behavior under Mac OS X as it does under Mac OS 9. e.g. animated GIFs are "locked" in a frame if the mouse button is held down.
Create a mailbox using the Mail app preference panel (e.g. Jan 2001), drag all your mail you want to archive for that month into the mailbox. Quit Mail and go to your home library and find the Mail folder, open it and remove your newly created mailbox containing all your archived mail. I would then store this on a removable disc if my CD RW was recognized. For now I just store it on the hard drive of another Mac on my LAN.
NOTE: Please see the comments for some objective evidence that the speedup does nothing of the sort, and may actually slow your machine down a bit! The Dev Tools do have some useful utilities on them, and you need them if you want to compile UNIX source code, but don't install them for the sheer sake of a speed boost!
Full credit to MacOS Rumors, they reported that installing the Developer Tools (the third CD in the OS X retail box) made everything faster. I just tried it, and it's definitely true--even IE is zippier.
[Editor's Note: I've read this in a few places, but can't help confirm any speedup. I installed the Dev Tools about three minutes after I installed OS X, so they were in place when I ran my benchmarks. The theory that I've seen elsewhere on the net is that the "Optimizing System" step that happens at the end of the Dev Tools install was supposed to also happen at the end of the OS X install, but a bug stops it from running.
I'm not sure whether I believe it or not, but if you have the free disk space (600mb or so), it can't hurt to try. If you do, though, please time some application launches before and after you install the Dev Tools, and report back with your results. It'd be nice to have some objective evidence to back this theory!]
NOTE: You can run the "optimizing" routine at any time, by starting a terminal and entering:
sudo update_prebinding -root /
This can take quite a while to run, and may (or may not) speed up application launching times. G3-based users have reported speedups; most G4 owners have not seen any changes. Use at your own risk, and you may or may not see any benefit.
If you want to copy a audio track from a CD, you don't have to bother with importing it via QuickTime player or Toast Audio Extractor anymore. Just put the CD in and when you open it in the Finder, the files on there are in native .aiff format ready for you to just copy them straight onto your hard drive.