Suddenly Macbook Airs cannot mirror with Samsung LED55 Smart TV

Question

Level 1

8 points

Suddenly Macbook Airs cannot mirror with Samsung LED55 Smart TV

Both our MacBook Airs (one late 2010 and one 2013) both running latest Maverick 10.9.5 could easily and automatically mirror with our TV. Tonight neither of them can do it. The Samsung TV has a source that shows the mirroring icon. When that's selected, we get a screen that tells us that it's "Ready for connection. To get started launch ALLshare Cast on your device. "

This Allshare Cast is a Samsung dongle. Never got this information before.

Is there something else I can do besides going into System Preferences and turning on the simple mirroring in there? It used to work automatically!

Thanks.

MacBook Air (13-inch Late 2010), OS X Mavericks (10.9.5)

Posted on Nov 6, 2015 10:48 PM

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Answer 1

sterling r

Community Specialist

Nov 8, 2015 12:19 PM in response to drjoanny

Hi there drjoanny,

It sounds like you are trying to use your TV as an external display but it is not working. I would start by using the troubleshooting for external monitors in the following article:

Apple computers: Troubleshooting issues with video on internal or external displays

https://support.apple.com/en-us/HT201177

Try unplugging the video adapter or cable and then plug it back in.

If more than one video adapter is in use (or "daisy-chained"), troubleshoot by using only one adapter.
Example: A mini DisplayPort to DVI adapter connected to a DVI to HDMI adapter is an unsupported configuration because there is a series of adapters in use.

If available, try using a different display and or adapter (or use a different connector by using DVI instead of VGA, for instance).

Reset the system

You can reset the Mac's parameter RAM and SMC.

Reset the resolution

Start by resetting the Mac's parameter RAM. If the display does not come up, was previously set to an unsupported resolution, and still results in no video:

Start up in Safe Mode.

From the Apple () menu, choose System Preferences.

Choose Displays from the View menu to open the preferences pane.

Select any resolution and refresh rate that your display supports.

Restart your computer.

That should troubleshoot the mac side of the equation to help you isolate the issue if you need to reach out to the support team for your TV

Thank you for using Apple Support Communities.

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Answer 2

drjoanny Author

Level 1

8 points

Nov 8, 2015 12:24 PM in response to sterling r

Thanks for your reply.

After some time trying different things out. I went to a different older large screen Samsung TV (circa 2009) we have and tried mirroring there. The only option I had there was to SELECT the HDMI port that my cable was connected to! So I did that and got mirroring to work there.

Then I went back to my newer Samsung TV and did the same thing - problem solved! The simple solution was in front of me all that time and it worked! My laptop screen appeared right away.

Thanks for taking the time for replying!

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Answer 3

sterling r

Community Specialist

Nov 8, 2015 2:39 PM in response to drjoanny

You're very welcome, I'm glad to know you go the issue resolved.

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