Fear not, Leopard users, Apple is still watching out for you. QuickTime 7.7 for Mac OS X 10.5 Leopard closes quite a number of security holes. As is common, we have no sense of how worrying these vulnerabilities really are, but it’s probably worth updating if you use QuickTime in Leopard. And if you’re running Snow Leopard or Lion, move along, there’s nothing to see here. (Free, 68.85 MB)
Viewing Wi-Fi Details in Snow Leopard
In Snow Leopard, hold down the Option key before clicking the AirPort menu. Doing so reveals additional technical details including which standards, speeds, and frequencies you're using to connect, as well as what's in use by other networks. With the Option key held down and with a network already joined, the AirPort menu reveals seven pieces of information: the PHY Mode, the MAC (Media Access Control) address, the channel and band in use, the security method that's in use, the RSSI (Received Signal Strength Indication) measurement, the transmit rate, and the MCS Index. In Leopard, some, but not all, of these details are revealed by Option-clicking the AirPort menu.
QuickTime 7.7 (Leopard-only)
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I downloaded from the link you provided. When trying to install, when I got to "Destination" a got a 'block' saying that I need to use the software update.
Okay, so I launched QT 7.6.6 hit the software update and it said I was up-to-date.
Okay, so I App Zapped it. Tried the QT 7.7 installer still at square one.
I keep playing around, but if anyone has any suggestions...mucho appreciato :)
using Mac OS X 10.6.8
http://www.apple.com/quicktime/download/ still downloads the old 7.6.9 dmg. File size matches my existing 7.6.9 file, so it's not just a graphics glitch.
Hopefully, Apple's on top of this.
Matt described it the best: "Apple, whose attitude towards backwards compatibility ranges from somewhat cavalier to downright heartless."