Archimedes: Sorry for the delay... I wanted to test it again to make sure. Answer: As far as my ears can tell, there was no crosstalk or feedback at super-high volume with any of the three (solid-body electric) guitars I tested it with. I hope that helps.
Paul: Yes - the record button in the QuickTime Player app on your Mac. And I hear you about sending my signature via internet. But I do it anyway 'cause it's convenient.
Gio 1: Try installing 10.10.2 (you can download the installer in the App Store) first, and then update to the beta. That should work.
Jeremy: I'm not sure exactly how to best roll back to 10.10.2 (I've never had to do it.) But you should be able to either install it over the beta (unlikely) or (as you surmised) perform a clean install followed by Migration Assistant. For what it's worth, I've had to do that -- clean install with migration -- several times in recent memory. While it can be time consuming, it's relatively painless and has always performed as expected (i.e. restoring my Mac to where it was before I did whatever stupid thing I did). I hope that helps.
I think most people, if not most MacObserver readers, wouid be fine installing a beta OS on a second disk. But you're right - there is a chance they could mess up something with iCloud or Photos that would cause issues even after switching back to the non-beta disk. That being said, my advice stands for anyone who is going to install the beta. With two tested backups, you should be OK even if you have to blow away everything in iCloud. It could be a time-suck, but you shouldn't lose any data.
Thanks for the kind words. I appreciate them, Melissa. It was more fun than usual writing this one. :-p
Scott B: I agree and know I could use Automator a lot more than I use it today. I just put Automator Proficiency on my "someday" to-do bucket list. As for Alfred, I think it's prettier and does have a nice interface... But old habits die hard and after all these years, LaunchBar feels like an extension of my fingers. Thanks for sharing.
John said, "spend another 18 months fixing all the bugs in OS X Yosemite. Windows 10 is not such serious competition that Apple, in a panic, needs to come out with a new release this fall with hundreds more half-baked features." To which I can only say, "Amen!"
How much does it cost????????? (I'll buy it!)
OK, cthpher... The Millenium Falcon could be even dorkier than the Batmobile. I still wouldn't carry either if you paid me. But... Bryan probably would.