To solve problem of Parallel desktop after upgrading Mac to OS X Lion

If you can't start Parallels after Lion upgrade do this:

Open Terminal and past this 5 command lines one after another. After pasting first line, sudo command will ask you for your user password, so you have to enter it and press Enter (only after first command):

sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_hypervisor.kext"

sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_hid_hook.kext"

sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_usb_connect.kext"

sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_netbridge.kext"

sudo kextutil "/Library/Parallels/Parallels Service.app/Contents/Kexts/10.6/prl_vnic.kext"

Got a fix for the network guys...
once you follow the instructions above and get parallel to open, look at the lower bottom of the Parallel window and you should find two buttons, when you hover over it it should say configure and coherence.

Click the arrow pointing left on the configure button and hover to network adpter (looks like a spider web)

click it and on the drop down menu make sure it is using the bridged network setting and bridge it to the airport.

This should allow you to have wireless internet access through parallel..



Source: https://discussions.apple.com/thread/3216777?start=0&tstart=0