Here is how it’s done:
If you no longer use a printer, you can delete it from your list of available printers.
- On your Mac, choose the Apple menu > System Preferences, then click Printers & Scanners.
- Select the printer in the list, click the Remove button, and then click Delete Printer.
If you delete the printer that’s set as your default printer, macOS selects another printer as your default. To set a different printer as your default, choose it from the pop-up menu in Printers & Scanners preferences.
It’s as simple as that.
How to disconnect printer from iPhone?
Step 1: Launch the Settings app on your iPhone.
Step 2: Tap Bluetooth.
Step 3: Locate the printer in the list of devices and tap on the info button (i) next to it.
Step 4: Tap Forget This Device.
Step 5: Confirm that you want to remove the device.
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Hope this helps