I'm having the same problem also. My MBA isn't even a week old. Since I updated it this morning, Skype shows "no camera" available under it's preferences
I've closed all apps which may require the camera ie Photobooth, FaceTime and so on and still same problem.
I've also tried the SMC reset and still no luck.
This is extremely frustating.
I found this in google: http://community.skype.com/t5/Mac/OS-X-10-8-5-Broke-Skype-Video/td-p/1891729/pag e/2
The Skype for Mac Engineer:
After some investigation, we have found that the OSX 10.8.5 update is missing a specific file that would allow some apps such as Skype or iMovie to access the built-in facetime camera on Mid-2013 MacBook Airs.
At this point, we are not sure how this can be fixed, and we'll get in touch with Apple to see how we can solve this.
From our tests, however, external webcams should work. It's not the best workaround, but until something gets fixed, that is the only known (and hopefuly temporary) solution.
For the more tech-savvy readers:
The 10.8.5 update updated a CoreMediaIO plugin that accesses the MBA camera, but didn't bundle the 32-bits version of it.
Other (older and newer) versions of the OS do include a universal version (32 and 64 bits), but not 10.8.5.
This means 32-bits apps such as Skype or iMovie cannot load the plugin, making the built-in facetime camera invisible to these them.
Skype for Mac Engineer
Problem solved in Skype community by Sebastian, i share the solution here for other people who have this frustrating problem.
Hi to All
i have the same problem, but i have found a solution!!!
1. You need Time Machine
2. Go to folder /Library/CoreMediaIO/Plug-Ins/DAL/
3. Copy AppleCamera.plugin to good place (usb memory stick is the best place).
4. Go to Time machine in date that skype work fine.
5. Change AppleCamera.plugin with file from Time Machine
6. Restart system, Now skype need to work with camera.
This solution is only for this time until Apple make update for this problem!!!
If you don't have time machine backup download the plugin from this link: AppleCamera.plugin.zip 956 KB
I just used what Cybermaster suggested and it worked perfectly. The unit I tested it on was a 13" MacBook Air 2013. However the zip file cybermaster is pointing to failed to unzip my end (could be my machine mind you) but I thought I would upload the .plugin file I used. https://dl.dropboxusercontent.com/u/79320197/Plugin/AppleCamera.plugin.zip
Hope this helps.