Although Visio for Mac doesn’t exist, you can easily view the contents of a Visio file on a Mac without Visio, simply by converting them to PDF.
If you don’t want to pay for an alternative to Visio for Mac and don’t need to edit the Visio file, this workaround allows you to view Visio VSDX and VSD files on a Mac for free without having to download anything.
Can You Use Visio Online To View Visio Files on a Mac?
You can use the web version of Visio to open Visio files on a Mac but it requires a subscription to Visio Plan 1 for $5 per month with Microsoft 365. You can’t use Visio Online for free to view Visio files.