I can't imagine much oil of any kind is used in electronics. Maybe the hinges to computers? Even then there are better products that will last the anticipated 5+ years.
Glue? Possibly, but again I would suspect something entirely synthetic would be more robust. Realize we are all just users like yourself and don't work in Apple's factories where we can read from where products come. There's a general contact link at the bottom right of the page where you may find a way to write Apple and ask.
The only thing I can see with a web search (you can do that too!) is a few people complaining Apple Stores carry leather cases for electronics, but since those are usually extra purchases you can avoid them.
You can only address this question direct to Apple. Go to Apple support ...
http://www.apple.com/lae/environment/
Steve Jobs was a fruitarian and was committed to using as little animal byproducts as possible.
Are animal products or biproducts used in the production of apple products?
