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Numerical computation tools Apps
Gaurav Khanna sent me a pointer pointer to his page of heavy-duty numerical computation tools for OS X, including gcc, g77, MPI, and OpenMP. Check out Gaurav's ports here:

http://floyd.liunet.edu/~gkhanna/hpc.html

This stuff is way over my head, but if this is your field of interest, check out Gaurav's page. If you have feedback for him, just use the email link at the bottom of his page.
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Use regexps on mail.app header filters Apps
The default header filters in Mail.app will fail to filter out headers like "Delivered-To:". To fix this, in the Preferences --> Viewing panel, on the Show Header Detail pop-up, click Custom then double click on the "To" filter, and change it to "^To:".

These filters are Regular Expressions, or regexps. They are patterns that match text. In regexp, a caret (^) at the beginning of the string means "the string starts with".

^To: - matches only strings that start with "To:".

The original pattern "To" happens to match the word "To" at the end of "Delivered-To". That's why you see that extra header line.

[Editor's note: regexps are incredibly powerful, and for those new to UNIX (like myself!), incredibly obtuse and confusing. I've been doing some reading on the web about them, and I found a tutorial written by Jan Borsodi which I found to be thorough and easy to read. Worth a view if you'd like to know more of what you can do with regexps; "^" is just the tip of the (large!) iceberg!]
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Play 1980's video games using MacMame Apps
For those that didn't know it, MacMame (a universal arcade game emulator that can run 2,500 games!) has been carbonized for a while now. There's a new release (download 0.53) out now, and it runs quite nicely in OS X. At left is a quick snapshot of Galaga running on MacMame on OS X -- here's a larger version if you'd like a clearer view.

I ran into a couple of minor visual glitches with a few games, but they are generally quite minor and most games ran perfectly. MacMame provides a large number of options for configuring the video, and it's usually possible to find a setting that looks good and performs well. UPDATE: The 0.53 version (released 8/15/01) seems to fix most of the video glitches I was having. The games now look perfect!

Performance on my G4/733 was (expectedly) fine, even without telling MacMame to hog the CPU. One of the nice things about older arcade games, though, is that they don't require huge amounts of horsepower. MacMame also ran very nicely on our iBook 500.

MacMame relies on original ROM files for the arcade games that it plays. Follow the links on the MacMame web site as a good starting point. From a legal perspective, you should own a full-size arcade version of any ROM you download, as they are still technically not in the public domain.

NOTE: Make sure you also download the new OpenGL plug-in for OS X (and OS 9). It's in the downloads section of the MacMame site, and it lets you apply OpenGL effects (bilinear filtering to smooth the jaggies) to MacMame's games.

If you grew up playing the video games of the 1980's, MacMame is a must-have OS X application!
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Applescripting Seti@ home Apps
[Submitted by phlbbrtn on Saturday]

In this hint I will show how to control the Darwin (command line) version of Seti@home using AppleScript. For this there are these ingredients:
Read the rest to find out how to control Seti@home with AppleScript.
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OS X's free drawing program - Sketch Apps
Some people may not have noticed the free drawing program which comes with OSX. It's located in Developer/Applications/Extras and it's called Sketch. It's only installed if you do the developer install. It's a simple drawing program, with lines and circles and type, similar to Microsoft Draw. It's nice for simple diagrams when Illustrator is just too much work. The only catch is you have to save your work as a Sketch file (.sketch) before you can Save As a TIFF or PDF file.

[Editor's note: You'll also find Bomb.app (a program to show that a dying program won't affect the system) and WorldText.app (a TextEdit replacement with some nicer features) in the Extras folder - it's worth a look if you've installed the Dev Tools.]
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Replace the built-in FTP server Apps
Apple's built-in FTP server, which is started by clicking a button in the Sharing prefs panel, is probably sufficient for most users. It gives easy access to your machine via FTP, but has some limitations. If you wish to allow others to FTP to your machine, you need to create an OS X account for each user. If you want those users restricted to their home directory, you need to create an 'ftpchroot' file that limits their access. Other more advanced tasks, such as space limitations, require further tweaking to the FTP server.

If you'd like an easy way to put a more robust FTP server solution in place, check out CrushFTP by Ben Spink. CrushFTP is a Java-based application that runs on OS X (and OS 9!).

It has a wealth of options, including:
  • User (add/delete/modify) management within CrushFTP
  • Set disk quotas and other privileges by directory
  • Set maximum idle and connect times and bandwidth limits
  • Limit max downloads per session
  • Easily specify which port CrushFTP will serve from
  • Control which days a user may connect
  • Limit or allow connections based on IP address
  • Generate detailed usage reports
I ran a very simple speed comparison this afternoon (transfer one 7.9mb file from my Mac to my Win2000 laptop), and I was surprised to find that CrushFTP beat the built-in FTP server (444K per second vs. 440K per second). A more extensive test would have to be done on multiple files to verify the results, but CrushFTP seems to be just as speedy as the bundled FTP server -- at least in a single-user scenario.

CrushFTP is a $20 shareware application, and it's a fully try-before-you-buy package. If you're looking for a more advanced FTP server package, check it out.

NOTE: I am not a registered CrushFTP user, as my FTP needs are simple. It just seems like a well-developed alternative to the bundled OS X FTP server, with easily defined options. As with anything that allows direct access to your machine, please make sure you're comfortable with the product and its background before installing or using it!
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Access mail.app's POP mail boxes from OS 9 Apps
If you're ever booted in OS 9 (as I was earlier) and have a need for something that's in your OS X mailbox (which I did), I found that that it's fairly easy to find that something from OS 9.

Apple's mail.app stores your mail in ~/Library/Mail. Inside that folder are a series of directories for each email account you have enabled, along with a folder called Mailboxes. Inside of Mailboxes, you'll see Deleted Messages.mbox and Inbox.mbox. These are both plain-text files which can be opened and searched by almost any text processing application; I used Alpha in OS 9. I was able to find the data I was looking for, and then closed the file (without saving any changes, of course!). Later, when I rebooted into OS X, I found that (as expected) the mailbox files still work normally in mail.app.

I believe this only works for POP-style mailboxes where the mail is stored locally; I don't think it can be used to view your mac.com IMAP mailbox, for example.
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Maelstrom for OS X released! Apps
In an interesting example of 'coming full circle', Ambrosia's Maelstrom (an Asteroids-based space shooter with great playability) has been released as an OS X native application! I say 'coming full circle' because this version of Maelstrom was ported by Sam Lantinga from his Linux port of the original version of the game, which was written for the Mac IIsi (yes, it's that old!).

Even more impressive, the game now includes support for multi-player network play over the internet, and full source code is available. You can read all about it on the Maelstrom 3.0 home page, and you can download the game by clicking this link.

It plays great under OS X, and brings back fond memories of hundreds of wasted hours. If you think you're good, you can even enable the 'network high scores' option, which will show Internet-wide Maelstrom high scores ... I don't even come close to the bottom of the list!

One note of caution: On my G4/733 with the GeForce3 card, the game ran fine in full-screen mode. When quitting, however, my screen was completely black. OS X was working fine; I just couldn't see or do anything! So you may wish to exercise a bit of caution (quit all other apps, for example) before you try full-screen mode the first time.
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QuickTime preview 'throttle' in the Finder Apps
Caught this one over on the MacAddict OS X Tricks forum, posted by Jasoco. You'll need a two-button mouse to make it work...

In the Finder, use column view and select a QuickTime movie such that you can see the 'preview' square in the far right column. Start playing the clip in the preview window (just click the Play icon; don't double-click the movie).

Once it's started, click-and-hold on the fast-forward button on the right edge of the screen. As you're holding down the left mouse button, click-and-hold the right mouse button. The FF/RW buttons turn into a little slider that lets you control how fast you go backwards or forwards through the movie.

I couldn't find a key to hold down that would mimic this behavior, so it looks like it's restricted to two-button mice. Strangely enough, it also does NOT work in the actual QuickTime Player; only in the Finder.

I'm not sure what value this is, but it's sort of interesting...
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Free stuff for iMovie2 Apps
Although this is not strictly OS X-related, I've been playing with iMovie2 a lot lately (working on a project for my wife's company), and thought I'd pass along a pointer to some free iMovie stuff that can further enhance your projects.

If you go to http://www.apple.com/imovie/freestuff, you'll find a ton of free goodies, including some nice artistic backgrounds, sound effects sets, and looping music tracks.

While you're there, also check out http://www.apple.com/imovie/freestuff/audio.html, as that page seems to have even more background sound sets that are not linked from the primary 'freestuff' page.
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