Hi! I have a MacBook Pro 13-inch, Early 2011. How do I update it to the latest Mac OS X? I need a 10.12 version to download Zoom. I have ‘updated the software’ but I only get the 10.7 version. Kindly assist. Warm regards, Nette

First, you need to upgrade to El Capitan: How to upgrade to OS X El Capitan - Apple Support. Then, to upgrade to High Sierra you will need: How to upgrade to macOS High Sierra.

Before You Upgrade macOS

1. Fix any problems before upgrading.
2. Run First Aid in Disk Utility while booted from your Recovery HD.
3. Backup. Make a bootable clone using CarbonCopy Cloner or use TimeMachine.
4. Be sure your startup disk has 18-20GB of free space during the installation.
5. Upgrade third-party software for compatibility. See App Compatibility Table - RoaringApps. If you have mission critical software, then DO NOT upgrade until you know that software is compatible with the version of macOS you are about to install.
6. Disconnect all third-party peripherals.
7. Download the installer which will be in the Applications folder. Quit the installer after it opens, then make a copy of the installer and save it in the Downloads folder. The one in the Applications folder will be deleted after a successful installation.
8. The download is large, anywhere between 5 and 9GBs. It takes time to complete. Be patient.
9. Double-click on the installer in the Applications folder. Click on the start button to begin the installation.

Hey!

You should be able to upgrade to MacOS High Sierra.

Here's How: ( See also: https://support.apple.com/en-us/HT208969 )

Go to https://apps.apple.com/in/app/macos-high-sierra/id1246284741?mt=12 which will take you to the Mac App Store.

Then Download MacOS High Sierra from the App Store.

Begin installation

After downloading, the installer opens automatically.

Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed. 

If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Allow installation to complete

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.

Hope this helped.

Back up your data, check your applications for compatibility, and download Sierra; after it's installed, you can upgrade to High Sierra. It's not possible to upgrade straight from Lion to High Sierra, or upgrade that Mac model past High Sierra.

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Ensure you're clicking on the Sierra link I posted; the High Sierra one won't work as is, and neither will any of the updaters on Apple Support's website. If you use the El Capitan one, you'll need to upgrade again to use Zoom; unless you're going to upgrade to High Sierra anyway, the process will take longer, and there's more chance of something going wrong.

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