Hopefully this will be helpful for people....here are some workaounds for three bugs I (and many others) have seen running Parallels on a Mac Pro. If you have any fixes for other common Mac Pro Parallels issues or comments on these, post them here...maybe this thread can be made sticky to help people. I can't visit most websites or other internet locations...a few work, but most just don't...: (i.e. IP networking isn't working) Open Mac Network preference pane (in your Mac's System Preferences). Click on "Built-In Ethernet" then the Ethernet tab. Configure Manually (advanced) Under Maximum Packet size, click Jumbo, then click Apply. Now click Standard, then click Apply. You're good to go now, but you will have to re-do this every time you start a new virtual machine (blech!) I get an error that VT-x support isn't enable and Parallels is very slow To get VT-x working Quit Parallels, sleep machine, wake machine up, start Parallels. You're set now until the entire Mac is restarted (you can even quit and relaunch Parallels, your mileage may vary) Shared Folders won't work: There's no workaround in Parallels, but luckily you can shared your home directy from the Mac side and access it from within Parallels. Go to Preferences (on your Mac), Sharing. Click Windows Sharing and enable it (you may have to choose an account for which to enable this; choose the account you are logged in as on your Mac Pro) Switch to the virtual machine; click My Network Places in Windows. Entire Network; Microsoft Windows Network, then Workgroup, and then you will see your home (mac) directory listed. Double click it, authenticate with your Mac login/password and you will see the folders in your Mac home direcoty. You can thus share files this way.