I went through a lot of the trouble that people describe here, and did several jumps back and forth between version 3 and 4. No systematic work here, I just kept running like a rat in a labyrinth 
Upgrade always stopped with option to enter safe mode, which did not work, only giving me a black screen with a single dead underscore.
Enter Transporter. I read a post about it here, thank you to the one posting it!
With Transporter, I could use the hd image backup to get a new VM based on my old hd image. I kept using the "magic" keys to get manual access during upgrade, to supervise and deflect the various "new device" prompts.
After a lot of restarts, initiated by the upgrader, I am now the happy owner of a working parallels 4. And it does seem to be a nice app.
To bad about the somewhat faulty installer. I hope the team will get it up and running soon.
Upgrade always stopped with option to enter safe mode, which did not work, only giving me a black screen with a single dead underscore.Enter Transporter. I read a post about it here, thank you to the one posting it!
With Transporter, I could use the hd image backup to get a new VM based on my old hd image. I kept using the "magic" keys to get manual access during upgrade, to supervise and deflect the various "new device" prompts.
After a lot of restarts, initiated by the upgrader, I am now the happy owner of a working parallels 4. And it does seem to be a nice app.
To bad about the somewhat faulty installer. I hope the team will get it up and running soon.