Ubuntu Installation Guide Mac
Make sure your system meets these requirements:
- Operating system: Mac 10.7 10.8 10.9
- RAM: 2GB.
- Disk space: 10GB
Step 1: Download and install VirtualBox for your platform: 
Step 3: Create a virtual machine in VirtualBox (type: Linux, version: Ubuntu, other options: default if you have no ideas)
Step 4: Start the virtual machine, choose the Xubuntu iso file you downloaded in step 2, and follow default options to install Xubuntu.
Step 5: Once you have Xubuntu Installed, start it, open a Terminal window and type:
sudo apt-get update sudo apt-get install -y curl
You will need to enter your admin password.
Step 7: When the previous installation is finished (it should be quick), follow QSToolKit_Installation_Guide_Ubuntu to install QSTK.
You might have problems with resolution, internet connection or other issues in VirtualBox. Go to the piazza forums and ask for help! There are smart people there ready to help.