Can i upgrade el capitan to high sierra

Hello, Createsunshine.

Maybe.

The macOS version you can upgrade to depends on the model and year of your Mac.

For details about your Mac model, click the Apple  icon at the top left of your screen and choose About This Mac.

These Mac models are compatible with macOS 10.13 High Sierra:

• MacBook (Late 2009 or newer)

• MacBook Pro (Mid 2010 or newer)

• MacBook Air (Late 2010 or newer)

• Mac mini (Mid 2010 or newer)

• iMac (Late 2009 or newer)

• Mac Pro (Mid 2010 or newer)

If you find your Mac is qualified to run High Sierra, then here's how.

How to Upgrade to  macOS 10.13 High Sierra:

❗️- Backup your data! - (You’ve been warned.)

Learn How to Back up your Mac with Time Machine:

https://support.apple.com/en-us/HT201250

❓- Is your Mac compatible with macOS High Sierra?

That depends on the age of your Mac. Check the requirements here:

https://support.apple.com/kb/sp765?locale=en_US

These Mac models are compatible with macOS High Sierra:

• MacBook (Late 2009 or newer)

• MacBook Pro (Mid 2010 or newer)

• MacBook Air (Late 2010 or newer)

• Mac mini (Mid 2010 or newer)

• iMac (Late 2009 or newer)

• Mac Pro (Mid 2010 or newer)

For details about your Mac model, click the Apple  icon at the top left of your screen and choose About This Mac.

✅ - Download the macOS 10.13 High Sierra upgrade installer here:

https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12

(Don’t use FireFox for this link)

The download will place the "Install macOS High Sierra" application in the Applications folder. Double-click the installer to begin the upgrade process. 

📚 - Learn how to get other old versions of macOS:

https://support.apple.com/en-us/HT211683

You're welcome.

And thanks... you have a great day, too. 🙂