Most Mac OS X users appreciate the simplicity of Mac application installation; it usually involves nothing more than a drag and drop out of a disk image, or simply unzipping a download. Still, some apps, plug-ins and other digital goodies require an installer, which means you're entering your password and granting permission for a program to place files anywhere on your machine.

If you've ever been curious (or concerned) about this operation, Apple's default Installer app (found in /Applications/Utilities/ and used by most independent software vendors - but not all - use to distribute their products) can display a log of every file a piece of software installed on your machine, accessible under File > Show Files after the Installer finishes its work (but before you quit/close it, of course). As you can see, the log is even searchable, making it easy to sift through those big install operations.

If you want to grab a copy of this log you can of course select all the text and copy/paste to your own file, but most installers (including those not from Apple) should place a copy of the install log in ~/Library/Logs, in which case you can use the Console app (also in the Utilities folder) to browse through those logs and easily mail a copy (with help from this tip) to a friend or developer. Some installers, however, place the log directly on your Desktop or on the root of your hard drive, and in my experience, most of those don't put a copy in the default logs location at all. Tsk, Tsk, guys.

These tools should make a handy addition to your tool belt if you're beginning to keep a more watchful eye on what gets put where by these installers, or of course if you're simply interested in learning more about how Mac OS X is built and where files go to get the job done.

The French site Mac4Ever appears to have found evidence (in the newest developer release) that Leopard will include the ZFS file system to supplement HFS+. What is ZFS you ask, and why should you care? Well ZFS is a pretty darn cool next generation file system created by Sun that includes a variety of cool new features for protecting your data (if any file system features can properly be called "cool"). John Siracusa over at arstechnica has written about ZFS several times, rather excitedly. I'll let him explain what the excitement is about:

"ZFS does away with the old restrictions on volume size and scope, while also addressing data integrity and performance issues, all from a purely software perspective. (Like one slide says, "ZFS loves cheap disks!")

The end game is a world where storage-even personal storage-actually behaves like the magically intelligent, infinitely expandable cloud that we'd all like to think it is, and less like those temperamental little cylinders (to use some diagram-speak, if I may). It's daring, free-thinking stuff."

If this is true and ZFS is in fact shipping with Leopard, it may go a long way towards explaining how Time Machine will work in the final release, despite the fact that in the original developer release Time Machine did not use ZFS. It would be yet another example of Apple being out on the edge and leading the mainstream PC industry (linux hackers don't count) forward.

[Via Digg through OSNews]

Disk Utility is a great maintenance and troubleshooting tool for those times when your Mac starts acting up. Repairing permissions can sometimes be handy (even though its true validity is in question as of late), but using the Verify and Repair Disk operations is often a more useful tactic. However, until Mac OS X 10.4.3, you had use Disk Utility to verify or repair your Mac's drive from some sort of an external source. You either had to plug into another Mac in Target Disk mode, or reboot and use the install disks that came with your Mac - not the most friendly process to your workflow. But now, With 10.4.3 and later, you can start up Disk Utility right from within Mac OS X and chose the verify option to make sure system level elements like your file catalog are all in order. One warning though: it is completely normal for your Mac to temporarily freeze or 'seize up' at the beginning of running this operation (you should get the infamous beachball), as this Apple support document explains. After a little while, depending on your Mac's speed and all that jazz, it will come out of its daze and you can continue working/chatting/surfing while it finishes the disk verification process.

This is a really handy tool, perhaps even more valuable than checking permissions, and should be a welcome addition to any Mac maintenance arsenal.