Update: Mac OS X 10.6.3 has been released and contains a few Airport bug fixes, it would be wise to install that software update in addition to trying these tips.Some more Wireless connection troubleshooting tips: * Update to the latest version of Mac OS X (10.6.3 includes numerous Airport fixes) * Reset your router * Reset your cable modem/DSL * Disable WPA/WEP protection * Change security protocol from WEP to WPA/WPA2 * Switch wireless channels – pick a channel no neighbor is using.I don’t know why but when I upgraded to Snow Leopard my wireless internet got all wonky, connections were dropping left and right and I couldn’t maintain any worthwhile airport connection for longer than a few minutes.DHCP was behaving particularly strange and the automatic settings pulled from my router were dropping every few seconds.I’m reposting this here not only as some sort of catharsis but also in the event that it helps someone else troubleshoot their wireless problems in 10.6.Here’s what I did to fix my Airport wireless connection from dropping in Snow Leopard.* Turn Airport on & off (via menu or Network preferences) * Delete and then recreate/reestablish wireless network connection * Create a new Network Location * Make sure your router firmware and Airport card firmware is up to date * Zap the PRAM on your Mac (hold Command+Option+P+R on restart) * Flush the DNS cache using the Terminal command: dscacheutil -flushcache * Delete the com.apple.internetconfigpriv.plist and com.apple.internetconfig.plist files from ~/Library/Preferences * Trash your home directories System Configuration folder and reboot – Remove all files within ~/Library/Preferences/System Configuration/ and reboot your machine.There was no silver bullet, but each setting allowed my airport connection to become more stable, and the combination of all of these changes has sustained a connection without dropping: * Changed DHCP auto settings to manual – now I manually set my IP address on the network, I just set something high so it wouldn’t interfere with other DHCP machines.
* Disabled “Wireless G only” Mode – what seems to have finally sealed the deal was disabling ‘Wireless G Only’ mode that I had set on my router, yea things could theoretically be a little slower but I haven’t noticed, and I’ll wait an extra millisecond or two for a webpage to load if it means I can use my Mac Book wirelessly at home as intended.Interestingly enough, I tried doing each of these things entirely on it’s own and it did not resolve the problem, it was the combination of everything that seems to have ‘fixed’ my airport connection problems.* Change Wireless Channels – I noticed that a neighbor recently changed their wireless channel to the same one I was on, it’s a weak signal but can still cause interference.I logged into my wireless router and changed the wireless channel to a more obscure and unique one.
I know my wireless connection issues with Snow Leopard are a fluke here, I imagine it’s something unique to my network and router that only a few other users will encounter.
Anyway, if you’re having any wireless connection problems in Snow Leopard 10.6 too, try these things out and see if it works for you as well.