I'm having a hard time updating my IOS on my macbook
How do I update the IOS?
MacBooks don't run iOS, they run Mac OS.
Upgrades are between annual releases.
Updates are security patches and improvements to upgrades.
Apple menu -> System Preferences -> Software Update takes care of the latest updates.
App Store has upgrades.
Your hardware limits what you can upgrade to. Go to Apple menu -> About This Mac and tell us the age of your computer and whether it is a MacBook, MacBook Air, or MacBook Pro.