Why won’t my printer show up on my Mac?
If you can’t add the printer because it doesn’t appear in the list of available printers, it may be turned off, or your Mac may be on a different network now. If the printer was shared by another user, the user may have stopped sharing it, or the user’s Mac may be offline.
How do I find a wireless printer on a Mac?
Choose Apple menu > System Preferences, then click Printers & Scanners. Select your printer in the list. If the printer isn’t listed, click the Add button , select your printer, then click Add.