Parallels Ate My Ethernet
By Josh Simons on May 18, 2006
Last night Parallels virtualization software ate my Mac Book Pro's ethernet. At the time, I was at the Hilton Garden Inn in Austin (recommended if you are visiting Sun's Austin campus) and having trouble connecting to the Internet using their complimentary high speed access. The symptom was an immediate (as in "very fast with no timeout delay of any kind") failure to reach any web address with a statement from Safari that I was not connected to the Internet.
Turns out that the virtual ethernet device installed by Parallels had somehow become active, even though I haven't run Parallels beta6 since it corrupted my Windows XP virtual machine. Looking under Network Preferences --> Network Status I could see my Airport and the Parallels Host-Guest Adaptor, but no Built-in Ethernet. Odd. But I remembered reading something about this on an online forum.
I fixed the problem by deactivating the Parallels Host-Guest Adaptor under Network Port Configurations. The built-in ethernet came back and all was well.