Objective Development has released Little Snitch 3.3, a maintenance release to the company’s networking monitoring utility that provides compatibility with OS X 10.9 Mavericks, rejiggers the welcome window, and moves some alerts to Notification Center. The update also improves the behavior of Profile Switching Alerts and when filtering during a system startup, fixes an issue that displayed IP addresses instead of the actual hostnames, improves positioning of the Network Monitor window on multiple display setups, and fixes a bug that prevented a Network Monitor document from being saved from the closing dialog. ($34.95 new, free update, 20.8 MB, release notes)
Option-Click AirPort Menu for Network Details
If you hold down the Option key while clicking the AirPort menu in Mac OS X 10.5 Leopard, you'll see not just the names of nearby Wi-Fi networks, but additional details about the selected network. Details include the MAC address of the network, the channel used by the base station, the signal strength (a negative number; the closer to zero it is, the stronger the signal), and the transmit rate in megabits per second showing actual network throughput. If you hover the cursor over the name of a network to which you're not connected, a little yellow pop-up shows the signal strength and type of encryption.