MacBook Air 2015 no video on external monitor

Hi, I recently got a 2015 13" MacBook Air as an upgrade to my 2013 13" Air. I use a 27" Acer monitor with a 1920x1080 resolution concurrently with the laptop's screen, and it worked perfectly with the old 2013 but since I got the 2015 model I haven't been able to use the monitor with the new laptop except for the very first time I plugged it in-there's no video. The monitor natively uses an HDMI port to which I connect the laptop with a Mini DisplayPort/Thunderbolt to HDMI adapter, I believe. I know there was a graphics driver update in addition to the new Mac OS 10.10.3 update, both of which I've installed, but the issue remains. Please let me know if you have any advice. Thanks

Sounds grim.
It would appear for whatever reason, COLOR can't see the Kona3. Driver issue? Are you using the Non-Desktop version of the latest Kona3 software?
What mouse are you using? Magic Mouse is a non-starter.
jPo

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You have the display set in Extended Desktop mode with the MacBook as the main screen. In System Preferences>Display on the MacBook screen there should be an Arrangement tab when you have the MacBook hooked up to the TV and both screens working. When you click the Arrangement tab do you see two monitors side by side? One of them will have a Menu Bar at the top. Just click on the Menu Bar and drag it to the second monitor. That will make the second monitor your main screen.
You can now use your MacBook in Clamshell Mode with a wired or Bluetooth keyboard and mouse. http://support.apple.com/kb/HT3131 When you disconnect from the TV your Menu Bar will automatically change back to the MacBook.
Or if you want to use the MacBook’s keyboard and trackpad to work on the MacBook screen while showing it on a TV you can check the Mirror Display box on the lower left hand side of the Arrangement tab under the two monitors box.
If you can’t see your MacBook screen because it’s broken or the backlight is off use the F7 key to switch between Extended Desktop and Mirror Display.
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Known issue?
Thanks!

I was runnig into the same problem. Plugging in to the apple 23" display at work worked well, but when I plugged in my Dell 23" at home the fan started being noisy...
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I will confirm later on.

What type of antivirus software do I need for a MacBook air 2015?

I have a new MacBook air 2015. What type of into virus software do I need? What is sophos?

What type of into virus software do I need?
Nothing your MBA doesn't already have. Avoid everything else.
There will always be threats to your information security associated with using any Internet - connected communications tool:
You can mitigate those threats by following commonsense practices
Delegating that responsibility to software is an ineffective defense
Assuming that any product will protect you from those threats is a hazardous attitude that is likely to result in neglecting point #1 above.
OS X already includes everything it needs to protect itself from viruses and malware. Keep it that way with software updates from Apple.
A much better question is "how should I protect my Mac":
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Illegally obtained software is almost certain to contain malware.
"Questionable sources" include but are not limited to spontaneously appearing web pages or popups, download hosting sites such as C net dot com, Softonic dot com, Soft pedia dot com, Download dot com, Mac Update dot com, or any other site whose revenue is primarily derived from junk product advertisements.
If you need to install software that isn't available from the Mac App Store, obtain it only from legitimate sources authorized by the software's developer.
Don’t supply your password in response to a popup window requesting it, unless you know what it is and the reason your credentials are required.
Don’t open email attachments from email addresses that you do not recognize, or click links contained in an email:
Most of these are scams that direct you to fraudulent sites that attempt to convince you to disclose personal information.
Such "phishing" attempts are the 21st century equivalent of a social exploit that has existed since the dawn of civilization. Don’t fall for it.
Apple will never ask you to reveal personal information in an email. If you receive an unexpected email from Apple saying your account will be closed unless you take immediate action, just ignore it. If your iCloud, iTunes, or App Store account becomes disabled for valid reasons, you will know when you try to buy something or log in to this support site, and are unable to.
Don’t install browser extensions unless you understand their purpose:Go to the Safari menu > Preferences > Extensions. If you see any extensions that you do not recognize or understand, simply click the Uninstall button and they will be gone.
Don’t install Java unless you are certain that you need it:
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Java can be disabled in System Preferences.
Despite its name JavaScript is unrelated to Java. No malware can infect your Mac through JavaScript. It’s OK to leave it enabled.
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Beware spontaneous popups: Safari menu > Preferences > Security > check "Block popup windows".
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Popups themselves cannot infect your Mac, but many contain resource-hungry code that will slow down Internet browsing.
If you ever receive a popup window indicating that your Mac is infected with some ick or that you won some prize, it is 100% fraudulent. Ignore it.
The same goes for a spontaneously appearing dialog insisting that you upgrade your video player right this instant. Such popups are frequently associated with sites that promise to deliver "free" movies or other copyrighted content that is not normally "free".
The more insistent it is that you upgrade or install something, the more likely it is to be a scam. Close the window or tab and forget it.
Ignore hyperventilating popular media outlets that thrive by promoting fear and discord with entertainment products arrogantly presented as "news". Learn what real threats actually exist and how to arm yourself against them:
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OS X viruses do not exist, but intentionally malicious or poorly written code, created by either nefarious or inept individuals, is nothing new.
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If you elect to use "anti-virus" software, familiarize yourself with its limitations and potential to cause adverse effects, and apply the principle immediately preceding this one.
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Do install updates from Apple as they become available. No one knows more about Macs and how to protect them than the company that builds them.
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Kimapurado
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See this thread:
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http://community.skype.com/t5/Mac/OS-X-10-8-5-broke-Video-on-MacBook-Air/td-p/18 91729/page/4

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Startup – Question Mark
Startup Issues - Resolve
Startup Issues - Resolve (2)
Startup Issues - Resolve (3)

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I have installed flash player on my macbook air but some videos still don't play, what can i do?

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MatchingNode
YOUR SYSTEM INFORMATION
Your Flash Version
17.0.0.134
Your browser name
Internet Explorer
Your Operating System (OS)
Windows (Windows 7)
I cant take a screen shot of the flash player update tab as it wont let me and wont let me copy and paste sorry
i am using internet explore browser and trying to play facebook games thats where i am facing the issues.

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No, not directly. You would need to transfer your data from your iPad to your Mac and then back it up to an external drive.
Pete

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iTunes for Windows: Optical drive is no longer recognized, or "Disc burner or software not found" alert after install

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Thanks SP
But I need to do something more immediate than that.
One of the things my partner does is to advise her clients on their presentation skills. So she wants to video them doing a presnettation to her, and then immediatley play it back so they can both look at it whilst she critiques it.
There is no time to transfer video files and move between aplications.
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MacBook Air 2015 no video on external monitor

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