(My setup is: clean "Mountain Lion" install (with restore from Time Machine) and Airport Express base station. I checked the power management settings (command pmset) and defaults but couldn't find anything. If you have reset your router and attempted connection on another device, and your Mac is still refusing to go online, you know you are not alone. (These two don't relate exactly to disconnects after locking but more generally to connectivity problems in "Mountain Lion".)Īs a last resort, a clean install (restoring applications/settings from Time Machine) might help. Some claim that Apple WiFi equipment spares them from suffering this issue (maybe because an old, possibly incompatible base station was replaced?) ( and ).Ĭhange MTU size to prevent dropped connections (also ). To fix this, go to settings, for this click on the down. Lock the screen differently, for instance with a 3rd party program (, applies to Mac OS X 10.7.5) (I use hot corners for that). Most of the time, the wifi switch is turned off, and as a result, no internet connection as displayed. Although I own a similar MacBook Pro that runs 10.8.2 I can count myself fortunate not to suffer this issue.Ĭonsequently the list below is rather a compilation of possible fixes (some may even seem absurd or just plain obvious) than tested recommendations: Other people's Macs are misbehaving in a similar way, read for example this and this. Typical output is: AirPort preferences for en1: Some Mac models require an Ethernet adapter, such as the Belkin USB-C to Gigabit Ethernet Adapter or the Apple Thunderbolt to Gigabit Ethernet Adapter. To list the interface settings, run in Terminal. To use a wired connection to the internet, connect an Ethernet cable between your router or modem and the Ethernet port on your Mac. When WiFi is the only active interface (that is, no Ethernet cable attached). You can get it with this Terminal command: ifconfig | grep -B 6 'status: active' | head -n 1 | cut -d : -f 1 Where en1 is the name of your Mac's WiFi interface. right click for properties - advanced Disable Energy efficient ethernet (and or green energy) and Wake on magic packet. EDIT: Please see John's answer above, which basically says to open Terminal and run: cd /System/Library/PrivateFrameworks/amework/Versions/Current/Resources For anyone else with this issue disabling the following settings should work: Go to Device Manager, network adapters and find the ethernet one.
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