This feature is available on both the Mac and the Windows 10 app, and it works right out of the box. Microsoft Teams share screen not working on Mac. While both the Microsoft Teams Windows and Mac app have the screen sharing feature, setting it up on macOS is slightly different. This is because screen sharing on macOS requires special permission.

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This guide is about the How to Disable Red Badge Circle on System Preferences in MacOS. I will try my best so that you understand this guide very well. I hope you all like this guide How to Disable Red Badge Circle on System Preferences in MacOS.

• Mac OS has a rather useful built-in utility called the Keyboard Viewer – an onscreen keyboard that displays many of the possible symbols. To Activate the Keyboard Viewer: 1. Open System Preferences- Keyboard. Tick the box labelled Show Keyboard and Character Viewers in menu bar.
• (After restarting your Mac, you can use the Get Info command to see just how much space is available on the startup drive.) In the General area of the Get Info window, you’ll see the capacity of the startup disk, the free space (listed as Available), and the Used space.
• A wristwatch was the first wait cursor in early versions of the classic Mac OS.Apple's HyperCard first popularized animated cursors, including a black-and-white spinning quartered circle resembling a beach ball.The beach-ball cursor was also adopted to indicate running script code in the HyperTalk-like AppleScript.The cursors could be advanced by repeated HyperTalk invocations of 'set.
• I tried to remove the OS X Base System by erasing the SSD but it won't disappear. I tried the three reinstallation options (Recovery, Internet Recovery, USB installer) but they all bring me to a prompt for a username and password during the installation process. Is it possible to either avoid or delete the OS X Base System?

In MacOS System Preferences, a red character circle icon appears when a software update is available for Mac. This can be useful for users who want to be notified about software updates, but it can be annoying for other Mac users who specifically avoid a particular software update.

For example, many Mac users who ignore Catalina may have chosen to hide MacOS Catalina update notifications and prompts, but may still see a red update icon in their System Preferences icon.

This article explains how to hide and remove the red update ID from the view in the System Preferences icon in the Dock in modern macOS releases such as Mojave and Catalina.

How to hide the Red Badge Updates icon in MacOS system settings

Disabling the red update mark from the System Preferences icon requires the use of a terminal, if you are not satisfied with the command line, it is better to avoid using these commands, as they are for advanced Mac users.

1. Launch the Terminal application
2. Type the following syntax exactly on the command line:

defaults type com.apple.systempreferences AttentionPrefBundleIDs 0 && killall Dock

3. Click return, the dock will refresh automatically, and the System Preferences icon will no longer display a red refresh icon
4. Exit the terminal when you are done

Most users do not want to do this if they want to see a red mark icon when software updates are available. But if you specifically avoid a software update, or if you only selectively install certain system software updates on MacOS, you may appreciate the ability to hide the red icon.

If you’re having trouble with the above command, you can also choose to split the command into two separate components, the first of which is the default write command:

defaults to com.apple.systempreferences AttentionPrefBundleIDs 0

And the second component is updating the Dock using the killall Dock command:

killall Dock

The end effect is the same; the red refresh mark is missing from the MacOS System Preferences docking icon.

How to display the Red Badge icon again in System Preferences in MacOS

Returning to the default setting that shows the red character icon is easy, just change from 0 to 1 in the above command like this:

defaults type com.apple.systempreferences AttentionPrefBundleIDs 1 && killall Dock

Click the Return button to run the command again and the dock will refresh, displaying the red character refresh icon again.

Note that this way of hiding the red icon is specifically the icon in the System Preferences red mark that shows when software updates are available. For other apps that display red characters, you can remove red characters from other Mac OS application icons through Notifications preferences, and you don’t have to hide any terminal or command line, all of which can be accessed directly through the graphical user interface.

This trick also applies only to modern versions of MacOS where System Preferences is the delivery of system software updates. In previous Mac OS X releases that provided system software updates from the App Store, this method did not work.

Did you hide the red icon for software updates on MacOS? Did you disable the red icon because you avoided and skipped the MacOS Catalina update on a Mac or for some other reason? Do you know another approach to disabling or hiding the red icon in System Preferences? Share your experience, thoughts and comments below!

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Summary: This post helps fix a circle with a line through it (or a slash crossed-out circle) that shows on Mac boot and restart your Mac as usual. You'll also learn about what the prohibitory symbol means on Mac.

The sign, a circle with a line through it, has shown up on your Mac at startup suddenly. It's definitely not the bearer of good news but indicates some severe problems when Mac won't turn on normally.

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Take attention! All files on your Mac are in danger. To avoid permanent data loss, rescue it from your Mac first, and then try the solutions below to fix the prohibitory symbol on Mac.

• 1. Recover data from Mac stuck on a prohibitory symbol (To avoid forever loss)
• 2. Fix Mac/MacBook having the circle with a line through it issue
• 3. What does the circle with a line through it on startup indicate

Retrieve files from Mac which shows a circle with a line through it

This video provides a detailed guide to recover data from Mac that won't boot, go watching it now.

To get the data off an unbootable Mac caused by the prohibitory symbol issue, only data recovery software can help you.

iBoysoft Data Recovery for Mac is a reliable and secure data recovery software. With it, you can recover data from Mac that won't boot in a simple way.

To get data off from Mac showing up O with a line through it, follow these steps:

• Press Option + Command + R keys when startup until seeing the spinning globe. (Keep your Mac connected to the Internet all the time).
• When entering into macOS Recovery mode, select Utilities > Terminal.
• Type the following command to launch iBoysoft Data Recovery for Mac.

Then, you can scan, preview, and recover the files including documents, videos, photos, audios, etc. from your internal disk.

Have any questions? Learn more details from How to run iBoysoft Data Recovery in macOS recovery mode. If you don't want to read the article, watch the video above instead.

Guide to Fix the Prohibitory Symbol on Mac

To help Mac boot past the O with line through it or 🚫, and to fix your MacBook Pro having a circle with slash on startup, you can follow these steps.

Step 1. Boot the Mac into macOS Recovery mode

If your Mac like MacBook stuck on the prohibitory symbol screen and can't boot up normally, you can try to boot Mac into macOS Recovery Mode. Either from the local recovery system on your startup disk or from internet recovery system is okay.

Here is how to do this:

• 1. Force your Mac to shut down by holding the power button for 5 seconds around.
• 2. Restart the Mac and instantly hold Command + R key combinations.
• 3. Release these keys when you see the Apple logo or loading bar. Then you'll see the macOS Utilities, which means your Mac is in macOS Recovery mode.

Note: If you can't boot into macOS Recovery mode by the guide above, you can replace the key combinations with Option + Command + R (or Shift+ Option + Command + R), and keep your Mac connecting to the Internet.

If you are using an Apple M1 Mac and see this circle with a line through it, the way to boot into M1 Mac Recovery Mode is different.

Step 2: Repair the startup disk with Disk Utility

You may also see the circle with a line through it on your Mac if the Macintosh HD is corrupted.

First Aid in Disk Utility can find and repair errors that lead to Mac's unexpected behaviors that prevent your Mac from turning on. So, when your Mac won't boot past the sign of crossed-out circle, simply check, verify, and repair the startup disk with First Aid in macOS Recovery mode.

If First Aid succeeds in repairing the errors in the startup disk, you can quit Disk Utility and reboot your Mac as normal.

If unfortunately, you can't access First Aid in Disk Utility because macOS Recovery mode is not working, you can try Target Disk Mode.

It turns your troubled Mac into an external drive. Do this by connecting your troubled Machine to another Mac with the same OS or higher and restarting it while pressing the “T” key. Then you can open Dick Utility on the other Mac, select the troubled hard drive ((Which is the startup disk of the unbootable Mac) and click First Aid.

If First Aid found no errors and your Mac still starts up with a circle and a line through it, continue with the next movement.

Step 3: Back up files from the Mac and reinstall macOS

If First Aid fails to repair the startup disk, then it should be the incompatible Mac operating system that causes the prohibitory symbol on Mac boot. It happens when:

• you upgrade to the latest macOS but it not compatible with your machine
• the macOS build or version on your startup disk is damaged
• you downgrade the system from Time Machine backup and cause software conflict

Then, you can only reinstall a macOS that work with your Mac models to fix the prohibitory sign on MacBook Pro, MacBook Air, iMac, and Mac mini.

However, you should know that macOS reinstallation could risk losing your data on the Mac. Your files could get lost or deleted sometimes, so make sure you have a backup of your data. If you don't, you can recover data from Mac froze on a prohibitory symbol first.

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After your files are retrieved from the Mac that starts up to a circle with a line through it, or if you don't worry about data loss, you can move to reinstall the macOS.

What does a circle with a line through it mean at Mac startup?

Different from the Mac folder with a question mark issue, a circle with a line or slash through it means that your selected startup disk has a Mac operating system that can't be used by your Mac model.

To make it straightforward, Mac does detect an operating system in the startup disk, but it can't boot from that macOS version or build. And then feedback it with a crossed-out circle at startup.

Mac computers like MacBook Pro often boot into the 🚫 'Prohibitory sign' or other boot problems after macOS update. For instance, you update the system to macOS 11 Big Sur without checking the system requirements.

Some try to downgrade macOS Big Sur to older system with Time Machine backup, only to find that the crossed-out cricle at Mac startup due to incompatible OS.

So, the compatibility checking of the macOS and Mac models before upgrading is necessary.

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Conclusion

After trying the fixing guide in this passage, you can restart your Mac or M1 Mac to see whether the annoying sign of a circle with a line through it has disappeared or not. Hopefully, you'll get rid of this prohibitory symbol when Mac is booting up.

But if the startup disk is not detected in Disk Utility or by the macOS reinstallation wizard, it means your hard drive has failed and needs to be replaced. Or, you may want to contact Apple support for help.