I just installed new RAM into my MacBook, and wanted to ensure they're rock-solid. I heard recommendations for Rember (a GUI wrapper for memtest). And I went and downloaded it and ran it. And it completely blows. Beta software thorough and thorough. Yes it is beta, but it's so beta I don't understand why people recommend it. First, when I tell it to quit applications and the Finder, it only does so half the time. And when I run the test, sometimes it succeeds, sometimes it just gets stuck on one stage. It even beachballed on me sometimes, and I had to force-quit it. I figured memtest (the plain ol' CLI tool) would do. I found memtest for OS X, but the ******* wanted $1.39 for it, whereas the Windows and Linux versions are free. What the? Oh well. Just wanted to let people know. Rember bites.