osx 10.11.x
?
Parallels XX
?
Win XP32bit SP3 Net Framework 3.5 SP1 and Net Framework 4.0
QHY5-II <----
?? USB 2.0 or 3.0?
PHD 2 won't recognise cameras
Does 10.11.x recognise the camera? If not install the latest OSX update and try again. Or download and run the latest 10.11 Combo Update off Apple's website.
Does Windows recognise it? If not: tweak Parallels until Windows does.
To test Windows XP camera recognition:
look in Device Management under USB and see if the driver is properly installed without "?".
If it is installed correctly,
install IrfanView and go File-openScanner (or something similar like "Scanner"). That should open your camera and show the live image in IrfanView.
I'm sorry, I don't have a webcam here to see where in detail I would click to get it to work with my WinXP 64bit on OSX 10.10 and VirtualBox.
I'm sure it can be done, though. At least on OSX 10.10 I'm sure.
In the early 10.11 versions there was a change in how USB is managed by OSX, rendering all USB 2.0 audio devices unrecognised. Not sure whether that has been fixed in later updates or if it affected USB cameras, at all.
Edit: In March 2016, Parallels has issued an
update that fixes a known issue with USB devices in 10.11.2. make sure you are running that Parallels version.