How to disable iMac wireless

Go into System Preferences => Network => Airport (in left column) =>Click the pinwheel beside the Plus/Minus sign and select make service inactive should do it.

We are assuming by wireless you mean wi-fi, if so follow Bob's suggestion. If you mean Blue Tooth (another wireless technology) which is used for your wireless keyboard and mouse you would go to:

System Preferences, Bluetooth, uncheck the On box and uncheck the Discoverable box.

Regards,

Roger

Good point, never thought of BT. Bob :~))

😉

Hi,
we have wireless keyboard and mouse. How to disable the bluetooth on imac 27" without disturbing keyboard and mouse.