How to disable autocorrect for Messages in macOS

Messages for macOS, by default, check and correct spelling mistakes while you're typing. It is a handy feature, but it's a nuisance for someone who sometimes purposely wants to type in imperfect English. Even more so is for those who communicate via other English or Roman alphabet-based languages.

Autocorrect for Messages in macOS can be disabled from the toolbar menu for Messages.

1. Launch Messages.
2. Click on Edit at the Messages menu.
3. Click on Spelling and Grammar option.
4. Click on Correct Spelling Automatically to remove the tick mark.