I have a Macbook Pro from late 2013. I have not been able to update my system since high sierra!

Frkvespertine Said:

"I have a Macbook Pro from late 2013. I have not been able to update my system since high sierra!"

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Review the following...

Updating the macOS:

Determining which Update(s) will Install:

I. Verify Compatibility:

A. Start Here: Learn About Compatibility and how to Identify your Specific Mac Model - Apple Support

B. How to Verify:

I Reveal your Model:

What is the Model of your Mac? To find out...

1. Go to: Apple menu
2. Click: About this Mac
3. View: Second Line-Down

then...

II. Compare the Results:

See if the Model you found is shown here:

• macOS Ventura is Compatible with these Computers - Apple Support
• macOS Monterey is Compatible with these Computers - Apple Support
• macOS Big Sur 11 Hardware Requirements - Apple Support
• macOS Catalina 10.15 - Hardware Requirements - Apple Support
• macOS Mojave 10.14 - Hardware Requirements - Apple Support
• macOS High Sierra 10.13 - Hardware Requirements - Apple Support
• macOS Sierra 10.12 - Hardware Requirements - Apple Support
• OS X El Capitan 10.11 - Hardware Requirements - Apple Support
• OS X Yosemite 10.10 - Hardware Requirements - Apple Support

III. If Compatible:

Back Up your Mac First:  Be certain you Create a Time Machine Backup of your Mac, so that way you can have something to restore your Mac from, should anything go wrong with the reconfiguration.

The 13" and 15" Late 2013 Retina MacBook Pros will run versions of macOS up through Big Sur.

You can get upgrades to Mojave, Catalina, or Big Sur here:

How to download macOS - Apple Support

Before upgrading your Mac, make backups, and make sure that there's some free room on the drive that the installer can use to work.

Note that Catalina and Big Sur will not run 32-bit applications.