1. Find the Apple Logo in the top left-hand corner.
2. Select 'System Preferences'.
3. Select 'Network'
4. Select 'Advanced...'
5. Find the network in the list that you do not wish to automatically join.
6. Deselect the tick under the heading of 'Auto-Join', and then press 'Ok'.
7. Press 'Apply'.
8. Ensure you are on the correct network before continuing out of this settings menu. If you are at the College, select 'Glasshouse'.
9. You have successfully removed the autojoin feature.