Question: Is there a writing tool that can correct grammar in real-time across multiple apps on my Mac?

If you want a writing tool that can check grammar as you type it, across multiple apps on your Mac, Fixkey is a good choice. This native macOS app uses AI to check grammar in whatever app you're typing in, without ever taking you out of that app. It works with more than 200 languages and lets you customize keyboard shortcuts to work the way you want, so you can concentrate on the writing, not the grammar.

Another tool worth considering is Grammarly. Although it's available on Windows, Android and the web, it works well with macOS apps, offering contextual suggestions and grammar checking as you type. In addition to grammar and spelling checks, Grammarly offers features like plagiarism detection, style guides and citation tools, making it a good all-around writing improvement tool.

LanguageTool is another option. It supports more than 30 languages and offers a variety of tools, including grammar checking, tone suggestions and paraphrasing. It's available as a standalone app for macOS, but it also works with many writing tools and websites, so it's good for personal and professional use. It's free, but you can pay for a premium version with more features.

If you're an academic writer, Paperpal offers grammar checking as you type and context-sensitive language suggestions. It also checks for plagiarism and offers high-quality translations from academic papers. It works online or offline through integration with MS Word, and it's good for students and professionals.