The Pixelmator image-editing app has been updated to version 3.1 (nicknamed Marble) with a couple of improvements aimed at the new Mac Pro. It adds support for 16-bit-per-channel images, and it’s able to utilize the Mac Pro’s dual graphics processors simultaneously to accelerate composition rendering for faster and more responsive performance (see this blog post for more). Pixelmator also adds MILK Print on Demand as its on-demand printing partner, enabling you to order prints (as well as notecards, posters, and more). The update also adds a bevy of layer styles improvements, brings back a number of effects (including Pointillize, Pixelize, Mandala, Concert, and more), improves the stability of the effects rope, improves support for RAW image files, ensures that text stays visible on grouped text layers that are duplicated, and banishes the “Low disk space” message when it’s clear that your computer has ample storage space. ($29.99 new from the Mac App Store, free update, 36.7 MB, release notes)
View Extra Audio Details in Snow Leopard
In Snow Leopard, Option-clicking the Volume icon in the menu bar displays a list of sound input and output devices. Choose one to switch to it; it's much easier than using the Sound preference pane. Also, hold Shift and click the icon to set the system volume, which is separate from the general output volume.