Maverick OSX and Virtual BOX compatibility issue

I'm using Parallels and Maverics is currently downloading. I think most of the apps should be compatible on the new update. Will report if anything looks broken.

yes, safari 'looks' quicker (did not test) and rest all is fine.(including processing speeds)
Apple maps are back 😛
Also seems, the software suggests to register for iCloud feature , to aid in finding lost MacBooks. whatever !

I am though worried about thrid-party apps, hope they work-

Confirmed that Virtualbox 4.3 is indeed working with OS X Mavericks.

I had Virtualbox 4.2.18 and it was broken, saying vboxnet0 was not found. Attempts to add it failed.

Interestingly, "check for updates" said I was up-to-date, no updates available.

However, I deleted the Virtualbox.app and downloaded the new 4.3 from <a href="https://www.virtualbox.org/wiki/Downloads" target="_blank" rel="nofollow noopener noreferrer">Downloads – Oracle VM VirtualBox</a> and now I confirm that my existing VMs are indeed working great with vboxnet0.

looks like XQuartz does not come by default too, though the server and client libraries are available for OS X Moutain Lion.

By the way , I am observing some eerie behaviour with VBox and OSX, either the computer does not shut down or I have to reinstall VMBOx every time I want to use it. Hopefully I don't regret upgrading my software.

EDIT: I do regret upgrading. This problem is persistent, every time I reboot I have to reinstall VBox .

Ross is correct that everyone will need to upgrade to VirtualBox 4.3.

The reason for the missing host adapter(s) is listed here:

#-Link-Snipped-#

seems the newest version of vbox (4.3.4 r91027 )has fixed the issue.
1.Started vbox
2. hostadaptor settings are intact
3 started vm
4.shut vm
5.closed vm
6.restarted machine

so far so good.