How do I get an iMac to detect a Sony Bravia TV as a display?
Answer
Use a known-good HDMI cable and a compatible USB-C/Thunderbolt or Mini DisplayPort adapter that supports video out, set the Bravia HDMI input and try Standard HDMI signal format, then on the Mac open System Settings > Displays and detect displays. Many older Bravia sets need the Mac to be awake and the adapter to support the TV’s resolution.
Follow these steps
Verify the Mac port and adapter
Confirm you are using a Thunderbolt/USB-C or Mini DisplayPort port that supports video—not a USB-A-only data port. Check the adapter for a brand/chipset that lists HDMI video output for Mac.
You should see: You are using a video-capable port and adapter combination.
Set the Bravia HDMI input and format
On the TV, select the HDMI port you plugged into. Open Settings > External Inputs > HDMI signal format (wording varies) and set that port to Standard if Enhanced/high formats are available. Power the TV on before the Mac wakes.
You should see: The selected HDMI input is active in Standard format.
Detect displays on macOS
On the iMac, open System Settings > Displays. Hold the Option key and click Detect Displays if shown. Keep the Mac awake; try closing lid only on portables—not applicable to iMac all-in-ones.
You should see: The Bravia appears as a second display, or Detect Displays still finds only the built-in screen.
Swap cable, port, and adapter
Try another HDMI cable and another HDMI port on the Sony. If still dark, try a different known-compatible adapter. As a check, connect the same adapter/cable to another HDMI TV or monitor if available.
You should see: You isolate whether the adapter, cable, TV port, or Mac output is at fault.
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Extra tips
What to look for: TV “no signal”; Mac Displays pane showing only the built-in screen; adapter chipset/brand; Bravia External Inputs > HDMI signal format options
Before you change anything: Confirm the iMac port type (USB-C/Thunderbolt vs USB-A—USB-A ports do not output video). Note the exact Bravia model from the back label. Try another HDMI cable before buying parts. Avoid cheap adapters with no video chipset listed.
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