First things first. You'll need a driver for your Mac. 

1. Go  to www.konicaminolta.eu/eu-en/support/download-centre  and search for the  corresponding product depending on your primary spot: o'bizhub C257i' (GL_Greenhouse) In case you cannot find the right drivers for your OS - try searching the list of one  of the other printer models. You just need one driver across all floors - so yeah, you can use every printer in  the coworking. 
2. Install the driver as any other DMG package. Please note that the installation won’t start  automatically after the DMG image is mounted. The DMG package will install a  removable disk in the Finder. You have to open the removable disk and double-click  the .pkg file to install the printer drivers. 
3. Go to 'System Preferences' and choose 'Print & Scan'. For newer versions like MacOS  Ventura 13 you need to go to 'System Settings' and scroll down to 'Printers & Scanners'. 
4. Start adding a new printer by clicking on the '+' below the list of available devices. For  newer versions like Mac OS Ventura 13 you need to click on 'Add Printer, Scanner or  Fax...' 
5.  Click on the IP tab and enter 'Address' your_username@hu-printing.puzl.com. For  example, if your username is 'puzl' - then the 'Address' should be puzl@hu-printing.puzl.com . 
6. For 'Type' choose 'Line Printer Daemon - LPD' in the 'Protocol' field. 
7. In the 'Queue' field - type 'secure' (no quotes) for secure printing or leave blank for  default queue. 
8.  For 'Name' type 'Puzl Printer' for example. 
9. 'Location' is optional, so you can leave it blank. 
10. For 'Use' choose 'Select software...' option, select 'KONICA MINOLTA C257i PS' or  'KONICA MINOLTA C250i PS' from the list of available printer drivers (the latter being  the functioning option for newer OS). Click OK. 
11. Click 'Add' and if a second window appears - leave all fields as they are and click OK.  

Now the printer is ready for use :) 

Mac OS X  (everything before Sierra / 10.12) 

If for some reason you are still running a software from the previous era, follow these steps  which are slightly different than the ones above. Why not update your software (and maybe  hardware)? 

1. First things first. You'll need a driver for your Mac. Go  to www.konicaminolta.eu/eu-en/support/download-centre and search for the product  'bizhub C257i'. 
2. Install the driver as any other DMG package. Please note that the installation won’t start  automatically after the DMG image is mounted. The DMG package will install a  removable disk in the Finder. You have to open the removable disk and double-click  the .pkg file to install the printer drivers. 
3. Go to 'System Preferences' and choose 'Print & Scan'. 
4. Start adding a new printer by clicking on the '+' below the list of available devices. 
5. Click the 'Advanced' button in the toolbar. If you don't see the 'Advanced' button, right  click on the space in the toolbar and choose 'Customize'. Then drag the button from the  list and drop it on the toolbar. 
6. For 'Type' choose 'LPD/LPR Host or Printer'. 
7. For 'URL' type 'lpd://your_username@hu-printing.puzl.com '.  For example, if your  username is 'puzl' - then the URL should be lpd://puzl@hu-printing.puzl.com    . 
8. For 'Use' choose 'KONICA MINOLTA C257i PS' from the list of available printer drivers. 
9. Click 'Add' and then 'OK' to finish the installation.

Note: Printin gover VPN can fail so be sure to disable it!