Bug Off! Mac OS

Today’s mystery actually began a few weeks ago, when I updated my Mac Pro from Snow Leopard to Lion (OS X 10.7.2). I had previously upgraded the other two Macs in our house without incident.

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• Feedback Assistant is the best way to send bug reports directly to Apple because the app automatically collects all relevant system information and crash logs so you don’t have to. I wish Apple included this app in stable releases of iOS and OS X. On your Mac running a public OS X beta, Feedback Assistant appears right in the Dock.

Apple in macOS Big Sur 11.3 fixed a bug that could have allowed attackers to bypass the Mac's security mechanisms with a malicious document.

The software flaw allowed attackers to create a malicious application that could masquerade as a document, TechCrunchreported Monday. Security researcher Cedric Owens first discovered the bug in March.

According to Owens, 'all the user would need to do is double click — and no macOS prompts or warnings are generated.' The researcher created a proof-of-concept app that exploited the flaw to launch the Calculator app.

Although Owens' demonstration app was harmless, a malicious attacker could have leveraged the vulnerability to remotely access sensitive data or other information on a user's machine by tricking them into clicking a spoofed document.

Security researcher and Mac specialist Patrick Wardle also reported that the bug is being actively exploited in the wild as a zero-day vulnerability. He added that the flaw was caused by a logic issue in macOS's code.

Apple told TechCrunch that it patched the bug in macOS Big Sur 11.3, which the Cupertino tech giant released on Monday. In addition to that release, Apple also issued patches for the flaw to macOS Catalina and macOS Mojave.

In addition to patching the specific vulnerability, Apple's macOS Big Sur 11.3 update also includes fixes for a bevy of other security flaws. https://cleaningdatnow.weebly.com/android-desktop-software-for-mac.html.

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macOS Big Sur 11.3 should now be available as an over-the-air update to all users on compatible Macs.

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Start up from macOS Recovery

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps: https://downnfile543.weebly.com/iswift-4-0.html.

Apple silicon

Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.

Intel processor

Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.

If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.

Reinstall macOS

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Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.

Follow these guidelines during installation:

• If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
• If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
• If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
• Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.

After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.

Other macOS installation options

When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:

• On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
• If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.

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You can also use these methods to install macOS, if the macOS is compatible with your Mac:

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• Use the App Store to download and install the latest macOS.
• Use the App Store or a web browser to download and install an earlier macOS.
• Use a USB flash drive or other secondary volume to create a bootable installer.

Bug Off! Mac OS