Misjump
From Elite Wiki
The way to force mis-jump for a mac OSX may follow thus:
1. Pick target system
2. Exit station
3. Get far enough away to jump
4. Initiate hyper-space countdown
5.Hold down the down arrow key
6. Finish countdown
7. Blast those bugs!
If this does not work, you may either need to update Oolite or simply play normally. This has been tested on Linux, as well.