![]() ![]() : The underlying connection was closed: An unexpected error occurred on a send. > : The remote server returned an error: (401) Unauthorized.Īt () You experience one or more of the following errors when you access SharePoint: If you haven't taken steps to prepare for this change, your connectivity to Microsoft 365 might be affected.NET Framework not configured for TLS 1.2 Symptom Support for TLS 1.2+ will continue to be added to all Microsoft 365 environments for the next several months. If the issue continues or you need help with any of these instructions, contact Apple Support.As previously communicated in the Microsoft 365 Admin Center (for example, communication MC240160 in February 2021), we're moving all online services to Transport Layer Security (TLS) 1.2+. If you're using an external display instead of a built-in display, make sure that the issue isn't with your external display. In that case, follow the steps for if your Mac doesn't turn on. If you can't start up from macOS Recovery, your Mac might not be turning on at all. If the issue returns after restarting, reinstall macOS. If Disk Utility finds errors and repairs them, restart your Mac. If Disk Utility finds no errors, reinstall macOS. ![]() For details, see How to repair a Mac disk with Disk Utility. Try to start up from macOS Recovery, then use Disk Utility in macOS Recovery to repair your startup disk. If your screen remains blank, press and hold the power button for about 10 seconds again to make sure that your Mac is turned off. Press and release the power button and see if your Mac starts up. ![]() Press and hold the power button on your Mac for about 10 seconds.* If your Mac is turned on, this turns it off. If your Mac appears to be stuck on a blank screen, follow these steps. A blank screen (black, gray, or blue) should appear once or more as your Mac starts up. ![]()
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