OS X: How to install EAGLE as a non-administrator user

There are few EDA programs that run on Mac OS X. One of them is CadSoft EAGLE PCB & Schematic software (v5), but unfortunately the integration with Mac OS X is minimal.

OS X: Install package with administrative rights

There are some packages that can be properly installed only with administrative rights. If you are like me, and run your account with regular rights, you might face some installation failures with poorly build packages.