printer question

OK. Yes, it should be possible to use the printer in question with your iMac (except if it is one of the oldest 24-inch iMac models). Please confirm the model year.

Do you wish to use a network (Ethernet) connection to one of the LAN ports of a Wi-Fi router? Alternatively, a USB connection would be possible.

To begin with, it may be a good idea to reset the printing system. Does the operating system offer a suitable driver to use when (re-)adding the printer?

Reset the Mac printing system to solve a problem - Apple Support

Add a printer on Mac - Apple Support

If necessary, go to one of the above support pages, choose your operating system version, and download the appropriate drivers.

Hi,

Do you mean a Canon imageCLASS MF4770n?

https://www.usa.canon.com/internet/portal/us/home/support/details/printers/black-and-white-laser/mf4770n/imageclass-mf4770n

https://sg.canon/en/support/imageCLASS%20MF4770n/model

Any information about the operating system version and the iMac model year (there were earlier 24-inch iMac models)?

It is there.

Select operating system macOS Big Sur v11.0 (not macOS 11) - the US support page (link above).

Select macOS 11 (and Search) - the Singapore support page (link above).

Good luck!

Before installing/testing printer drivers, make sure that you have (multiple) backup copies of all important files (documents, photos, et cetera). Software conflicts can never be ruled out.

You're welcome! Good news!