These are the steps I used to make the changes.
In the virtualbox console:
- Shutdown your sandbox
- Right click the sandbox
- Select Settings
- Select the System tab
- Under System, select the Motherboard tab
- Adjust base memory so the slider is within the green area, adjust accordingly
- 4GB is a little low to be running virtual machines, you may want to consider adding more RAM to your macbook. Your mac and virtual machines are using the same RAM and CPU, so the more you have the better the virtual machines will perform.
- Under System, select the Processor tab
- Adjust the CPU so the slider is within the green area, adjust accordingly
- Click OK
- Start the sandbox
Thanks,
Jon