did it support Mac

I just joined. Does it support the Mac?

No, you cannot browse the internet (or use internet-based services) with the Macintosh. The Apple Safari browser is a figment of your imagination. (Oh, I so wish people would read the instructions provided. This is the second similar question today.)

First, this is a forum for discussing English grammar and style. The folks here are not Grammarly employees and many do not use the service. There is a separate place to ask questions about the Grammarly grammar checking service. You can find a link at the bottom of this page.

Second, the Grammarly grammar checker is a web-based service. All you need is a computer, an internet browser, and an internet connection. Any computer and any operating system can use a web-based service because nothing runs on your machine -- all of the processing is on a server somewhere.

Third, the Grammarly Word plug-in runs only in Microsoft Word for Windows. However, you do not need the plug-in to use the service.

I hope this helps.