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10.6: How to upgrade Parallels Desktop v3 to v4 Apps
If you're running v3 of Parallels Desktop, you will need to upgrade to v4 if you are running 10.6.

However, you must stop all the virtual machines before you upgrade to 10.6, because you can only upgrade Parallels to v4 if all they are stopped (not just suspended)!

If you've already upgraded to 10.6, then you can't run Parallels v3. You'll either have to delete your virtual machine files, or copy them to a hard drive and then restore them.

[robg adds: I can't test this one, as I already had Parallels v4.]
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10.6: How to upgrade Parallels Desktop v3 to v4 | 5 comments | Create New Account
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10.6: How to upgrade Parallels Desktop v3 to v4
Authored by: Mac Berry on Sep 30, '09 08:53:59AM

I'm not sure what you mean by "You'll either have to delete your virtual machine files, or copy them to a hard drive and then restore them.". Why can't I just install the update under 10.6 (obviously Parallels 3 won't be running, because it can't)?

Mark



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10.6: How to upgrade Parallels Desktop v3 to v4
Authored by: jchan on Sep 30, '09 09:31:35AM

When you suspend a session in Parallels, the system memory state is saved into a file restoring later. Let's say you suspended Parallels 3 in 10.5. Then you upgraded to 10.6. Now you can't launch Parallels 3 anymore to restore/terminate your suspended session.

Parallels 4 will not let you upgrade if it detects a suspended session because the session will be lost in the upgrade process. But if you've already got 10.6 then you're kind of stuck because you can't use Parallels 3 to terminate the suspended session.

The solution in this hint is to manually open your Parallels folder in Finder and delete the session files.



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10.6: How to upgrade Parallels Desktop v3 to v4
Authored by: Mac Berry on Sep 30, '09 11:10:45AM

OK, thanks - shame the hint couldn't explain that! It makes sense once you know the problem it's trying to solve, but needed to include an explanation of that. It also lacks detail - where would I find the files it mentions for example, what will they be called, and/or what extension am I looking for?

No problem here though, as everything was stopped before I upgraded to 10.6 anyway.



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10.6: How to upgrade Parallels Desktop v3 to v4
Authored by: marook on Sep 30, '09 11:41:23PM

The trick is to simply delete the SaveState files, so only the hdd and pref files are left - then the upgrade will run fine.

NOTE: the Virtual machine Will restart as if you unplugged the power cable by accident!

---
/Marook



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10.6: How to upgrade Parallels Desktop v3 to v4
Authored by: osxboy on Oct 05, '09 07:18:40AM

Hi All

Thanks for the update when I contacted Parallels for support I was told to copy the folders containing the VM files to a seperate hard drive and then delete the folders before upgrading.

If you can just delete the session files that's even easier and hopefully will help someone else who recieves the advice I did from Parallels.



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