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So as I understand, Apple will stop releasing updates for macOS High Sierra in September this year, is this correct I have a Macbook Pro 13 mid 2010 and High Sierra is the newest macOS version I can install on it.

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What will happen after Apple stops releasing updates, will it really be unsafe to keep using my MacBook What would be the risks Also, Ive seen I could use the patcher to install MacOS Catalina on my MacBook, but how would that affect performance Other than for everyday tasks like Internet browsing, etc, I plan on using Adobe Lightroom and Adobe Photoshop on my MacBook, would I be able to do that if I upgrade to macOS Catalina with the patcher Thank you.

But that doesnt really mean it will suddenly be open to exploits.

A knowledgeable user who knows to avoid the dark corners on the internet will always be the best security.

You will still have modern browser support for the foreseeable future, since Firefox and Chrome support Mac OS 10.9.

But Safari will be outdated soon after support ends.

About 99 of exploits out there will be browser exploits, so just use the current Firefox or Chrome and youll be quite safe.

And yes, you can easily put Catalina on it with the patcher.

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Do you know if using Catalina on an unsupported Mac can be risky Could I still use software like Adobe Lightroom or Photoshop.

I can tell you with certainty that I havent ever been in a situation where a vulnerability has surfaced and caused me issues.

As timidpimpin said, you can still use Chrome and Firefox for up-to-date browsing (Im a Chrome user myself) and that as well as practicing smart browsing will keep you safest.

I also have Avast Free Antivirus on my system as an added protective measure (I primarily use it for file scanning, but I also have real-time protection enabled).

I havent personally done it as any more than a test, but I know of many people who have done it and use unsupported Mac OS versions on their computers regularly.

It would probably depend on the versions of the software you have.

But once I started using APFS over HFS I never saw those issues again.

And actually, I think Catalina only supports APFS for the boot drive.

Once I started using APFS all my Apple software updates work flawlessly.

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