If the Messages app is not an option, Apple’s support site has detailed instructions for setting up the Mac for sharing in System Preferences and using alternative screen-sharing methods or iCloud’s Back to My Mac feature (until Back to My Mac is discontinued in the next version of the operating system). If you are remotely trying to configure settings on someone else’s Mac and you both have iOS devices, Apple’s FaceTime video chat app can be helpful for visual cues walking someone through setup steps; Microsoft Skype users can also share screens for visual reference.


Nov 11 Screen sleep -> WoW dies I've noticed that when I go AFK long enough that the screen is put to sleep, upon waking up, WoW is unresponsive. It's not even possible to alt-tab out or force quit it. I have to try to keyboard restart the Mac and wait for WoW to fail to force quit. This never happened with true fullscreen, because that mode prevented the screen from sleeping.Azreluna4 Nov 11

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Starting over again, multiple times, I kept getting the same result, until (without any real indicator of why) everything worked properly. The words "phone number" finally appeared above that field, and the form also automatically formatted my number in the (123) 456-7890 style and allowed me to receive the calls. This error came up during my first two calls, but not my third.
If you are the one providing the technical assistance, open Messages, select the name of the person you plan to help — or send a new message to start the conversation — and click the Details button in the upper-right corner of the window. Click the Screen Share icon, which looks like two overlapping rectangles, and select “Ask to share screen.” (If you’re the one needing the help, you can also reach out via a Messages buddy and use the “Invite to Share My Screen” option.)
Starting over again, multiple times, I kept getting the same result, until (without any real indicator of why) everything worked properly. The words "phone number" finally appeared above that field, and the form also automatically formatted my number in the (123) 456-7890 style and allowed me to receive the calls. This error came up during my first two calls, but not my third.
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Purchase a single incident of support for help troubleshooting Apple products such as AirPort devices, Apple TV, iPad, iPhone, iPod, or Mac computers; Apple operating systems such as iOS, OS X, or OS X Server (GUI only); Apple-branded consumer apps, such as FaceTime, Find My iPhone, iLife, iTunes, or iWork; or Apple-branded pro apps such as Final Cut Pro and Logic Pro.
For an MacBook Air under Apple’s One-Year Limited Warranty, Apple warrants against defects that arise from service performed for 90 days from the date of service or for the remaining period of the warranty, whichever provides longer coverage for you. For an MacBook Air not under Apple’s warranty, Apple warrants against defects that arise from service performed for 90 days from the date of service.

Every Mac comes with one year of hardware repair coverage through its limited warranty and up to 90 days of complimentary support. AppleCare+ for Mac extends your coverage to three years from your AppleCare+ purchase date and adds up to two incidents of accidental damage coverage, each subject to a service fee of $99 for screen damage or external enclosure damage, or $299 for other damage, plus applicable tax.1 In addition, you’ll get 24/7 priority access to Apple experts by chat or phone.2

When I tweeted — from my secret social-media account used to hide my identity as a reporter — for help about Spectre and Meltdown, Apple responded a short 10 minutes later. The company also included the correct information (update macOS on your Mac, and you're OK), along with a link to documentation on Apple's site that explained the situation in greater detail.
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