Hello there zirosky89,
Welcome to Apple Support Communities. Let's make sure that you have the correct steps for using autocorrection on your MacBook Pro. They can be found in the Apple Support article: Check spelling and grammar on Mac - Apple Support
Use autocorrection
When your spelling is checked, misspelled words are underlined in red, and suggested corrections are shown.
1.On your Mac, choose Apple menu
> System Settings, then click Keyboard
in the sidebar. (You may need to scroll down.)
2.Go to Text Input on the right, then click Edit.
3.Turn on “Correct spelling automatically,” then click Done.
Note: To have the first word of a sentence and proper nouns (such as California or Tim) automatically capitalized as you type, turn on “Capitalize words automatically.”
4.In an app, type your content.
5.As misspelled words are detected, do one of the following:
• Accept suggestions: If there’s only one suggestion, just keep typing to have the word autocorrected. If two or more suggestions are shown, choose one.
• Ignore suggestions: Press Esc, then continue typing.
• Undo autocorrections: An automatically corrected word is briefly underlined in blue. To revert to your original spelling, put the insertion point after the word to show your original spelling, then choose your spelling. You can also Control-click the word to show your spelling, then choose it.
Let us know the outcome, and we can go from there if needed.
We hope this helps you.