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4 Reasons Not to Install macOS Big Sur 11.5.1 & 11 Reasons You Should

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Apple’s new macOS Big Sur 11.5.1 update could have a huge impact on your Mac’s performance. While some of you should install the firmware today, others might be better off waiting.

macOS Big Sur 11.5.1 is a point release and it brings an important security patch to Mac devices. It doesn’t have any known features or bug fixes on board.

That being said, those of you dealing with issues on macOS Big Sur 11.5, macOS Big Sur 11.4, macOS Big Sur 11.3.1, macOS Big Sur 11.3, macOS Big Sur 11.2.3, macOS Big Sur 11.2.2, macOS Big Sur 11.2.1, macOS Big Sur 11.2, macOS Big Sur 11.1, macOS Big Sur 11.0.1, or macOS Catalina could see a huge turnaround after installing macOS Big Sur 11.5.1.

We’ve also heard about bugs and performance problems plaguing Mac users who decided to upgrade to Apple’s newest version of macOS.

Is macOS Big Sur 11.5.1 Good?

If you install macOS Big Sur 11.5.1 on your Mac, and you run into issues, you can downgrade your computer’s software in an attempt to improve its performance. Unlike iOS and iPadOS, the macOS downgrade is always open.

If you’re running macOS Big Sur 11.5, macOS Big Sur 11.4, or an older version of macOS, and you’re feeling leery about these issues, you might want to wait for more feedback about macOS Big Sur 11.5.1’s performance or Apple’s next batch of bug fixes for macOS Big Sur-related issues.

If you’re currently debating a move to macOS Big Sur 11.5.1, allow us to walk you through the best reasons to install the software today and the best reasons to hang around on whatever version of macOS your Mac is currently running for a little bit longer.

Install macOS Big Sur 11.5.1 for Better Security

Install macOS Big Sur 11.5.1 for Better Security

If security is important to you, you should think about installing Apple's macOS Big Sur 11.5.1 update right now.

macOS Big Sur 11.5.1 brings a brand new security patch to Macs. You can read more about it on Apple's website

If you missed macOS Big Sur 11.5, the update carried 35 new security patches that will help protect your Mac from harm. If you're interested in the details, check out the company's security site

If you missed macOS Big Sur 11.4, you'll get the update's 50+ security patches when you upgrade. You can read more about them over on Apple's security site

If you missed macOS Big Sur 11.3.1, it had two crucial security patches on board, both related to WebKit. If you want to learn more about them, head over to Apple's website

If you skipped macOS Big Sur 11.3, it also had patches on board. The list included one for a vulnerability that escaped built-in malware protections. For more on macOS Big Sur 11.3's patches, head on over to Apple's security site

If you missed earlier versions of macOS, you'll want to consider upgrading so you get their security patches as well. 

macOS Big Sur 11.2.3 brought one security patch to Mac users. You can read more about it on Apple's website

macOS Big Sur 11.2.1 had three security patches on board. You can read about them over on its security website.

macOS Big Sur 11.2 had a ton of patches on board and you can learn more about them right here

If you missed macOS Big Sur 11.1, it had 51 security patches on board. You can read about them right here.

macOS Big Sur 11.1 also included a new privacy information section on App Store pages that includes a developer-reported summary of the app’s privacy practices.

If you're moving up from macOS Catalina, you'll get macOS Big Sur 11.0.1's 50+ security patches. If you're interested these improvements, you can read about them over on Apple's website.

In addition to those patches, macOS Big Sur comes with additional security and privacy upgrades including improvements to the App Store and Safari. 

In Safari, you can now tap the Privacy Report button to better understand how websites handle your privacy.

With macOS Big Sur on board you can now get information on the App Store that will help you understand the privacy practices of apps before you download them. 

Researchers also discovered that Apple brought a new "BlastDoor" sandbox security system to macOS Big Sur, iOS 14, and iPadOS 14. The system is meant to prevent attacks from occurring via the Messages app. 

You can read more about "BlastDoor" right here

9 Comments

9 Comments

  1. Cindy

    01/26/2021 at 8:08 am

    Big Sur is terrible. My computer runs so much slower I’m ready to throw it out the window. Don’t download this program.

  2. Bob Gardner

    01/26/2021 at 9:28 am

    cannot maintain connectivity of screen share. One or both of us lose screen control. constant disconnects and frequent reboots. covid forced at-home business is getting impossible with Big Sur.

    I have a brand new 2019 MacBook Pro and my partner has a fairly new 2016 MacBook Pro. We were doing just fine on Catalina then switched to Big Sur and everything went to hell…we gave it a week to settle in with all of its syncing and updating stuff but then found that performance issues and bugs like entire system shut downs and black screen and spinning wheels started happening… this is supposed to be the best hardware we can buy and yet hampered by Big Sur and its issues is causing us to rethink going back to Catalina.

  3. Trevor Martin

    02/28/2021 at 2:32 am

    I have a MacBook Pro 2016. Big Sur automatically updated and as a result I can no longer use the MBP as a clam when connected to my BenQ 2700 monitor that I need for photo editing. When I try to log into my MBP in clam mode the screen goes blank after about 10 seconds and says it is not receiving a signal. Seriously! This latest update was supposed to sort a few things out for 2019/20 MBP …. not f**k a 2016 model… Unbelievable. Thanks Apple..

  4. Richard Welliver

    03/03/2021 at 7:40 pm

    Big Sur update 11.2.1 and now 11.2.2 will not update on my iMac (Retina 4K, 21.5-inch, 2019) It seems to download but when installing i get a error message that there is a problem with my internet connection.

  5. Michelle

    03/10/2021 at 2:01 am

    I have updated my MacBook Air late 2020 to 11.2.3.
    Can’t really see any difference. Since I bought the
    new MacBook the only problem I’ve had (which is very
    annoying) is that the auto login option is greyed out
    and I cannot disable the automatic login. In Library/
    Preferences the com.apple.autologin etc. is missing.
    Surprisingly enough I installed MacOs Catalina on my
    old MacBook Air mid 2012 and it works perfectly.

  6. Puran

    05/11/2021 at 6:45 am

    Actually i have a macbook air 2017 whose battery was not charging when i was using Catalina OS after updating it to the Big Sur the battery is charging now and is giving around 3 hours of battery backup. Will change my battery with in 10-15 days. Updating macOS worked well for me.

  7. Paul

    05/24/2021 at 3:21 pm

    Same here.

    After installing the 11.2, I had my laptop running crazy and my battery, which still held 9-10 hrs, got depleted to roughly 4 hrs….

  8. L. Mayhew

    06/01/2021 at 8:43 am

    I upgraded form macOS Catalina 10.15.7 to Big Sur……..Big mistake……..slow, balky, and unreliable. Mac support walked me through reinstalling Catalina..Thank you support!

  9. Linda

    06/29/2021 at 11:53 pm

    2017 Macbook Pro – updated Big Sur about three months ago and Touch Bar stopped working when restarted. Updated to 11.4 hoping would fix and now camera is black and doesn’t show content (system says it is there but nothing). Have tried so many things but nothing but frustration.

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