apt-get install linux-headers-generic build-essential 2. compizconfig-settings-manager dkms Install the guest drivers Open ccsm (from the console) and disable “Framebuffer object” option under “OpenGL” (be prepared that you won’t be able to read much, but if you activate 3D first, then it will be even worse) shutdown -h now Activate 3D acceleration in VirtualBox power on done. /usr/lib/nux/unity_support_test -p Source: http://askubuntu.com/questions/207813/why-does-an-ubuntu-12-10-guest-in-virtualbox-run-very-very-slowly/214968#214968

I had a fresh installation of Mountain Lion and installed Java 7. The problem was when I tried to run StandAloneJava applications ML always asked me whether it should install Java 6. Apparently a lot of people have this problem and here is the solution how to solve it.

After fighting against Java 6 from Apple I decided to install Java 7 and have a look into that. To say the least, I still feel quite nauseous so I keep this EXTREMELY short.

If you installed Java from Apple then you have the problem, that you have got a very old Version of Java.