The key information that you need is the printer name and that it is a 'Generic Postscript Printer'.
Don't forget to enable duplex printing!
Make sure you are connected to eduroam. click on apple at top left of screen and choose system preferences choose 'printers and scanners' The first time you do this, you need to add the Advanced button to the add printer toolbar: Ctrl-click on the toolbar, select Customize Toolbar... and then drag the Advanced button onto the toolbar click the '+' on the bottom left of the window to add a new printer. click on the 'Advanced button' Specify 'Type' from the menu as 'LPE/LPD Host or printer'. Leave 'Device' as 'Another Device'. Specify the URL as: astroprint: lpd://astroprint.star.bris.ac.uk astrocolour: lpd://astrocolour.star.bris.ac.uk Specify the name as 'astroprint' or 'astrocolour' and the location as 4.13. The LPD/LPR printer setup uses 'Generic Postscript Printer' and that should work fine. But you could set up a specific driver for the printer model (see above) if there are some special features that you want. If everything is OK, click the 'Add' button. If the 'Add' button is greyed out, check that there is no carriage return at the end of the URL. In the window that pops up next, ensure that there is a tick in the duplex box and the 'Tray 3' box is unchecked. Click OK. Now print something to the printer, eg this web page. The first time you print, click on the '+ More Settings' to make sure your paper size is set to A4 and not 'American letter' which may pause the printer.