Hi guys. Longtime lurker, first-time poster. Hopefully you guys can help me out. Ever since I "upgraded" my 2011 MacBook Pro to Mavericks last October, I've had an issue in which my laptop fails to connect to Wi-Fi unless I'm sitting close to (or sometimes, next to) the access point. Bluetooth is off, ethernet works fine, and I've made sure to set up the service order to my Wi-Fi and ethernet first. I've tried the trick where I copy and remove the Bluetooth plist file and/or the SystemConfiguration from the computer, then restart, to no avail. I've also reset the PRAM and SMC several times. My network password has been deleted and re-entered in Keychain Access. This problem has persisted for months. Before I try to get the wireless card repaired or replaced, I want to figure out if this is a software issue, and not related to the hardware -- wireless was working perfectly fine before the update to 10.9! If anyone can help, I'd really appreciate your responses. Thanks for all you guys do for everyone here.