Hey Steve, I’m sorry about the lack of clarity here. I know you’re in contact with support, so I’ve asked the team to take another look and help clear things up and do what we can for you.

Pretty sure we’ve got you covered already here! Assuming you have a Sketch subscription/workspace:

1. Create mockup of the new login window

2. Save the document to your Workspace

3. Invite marketing team to your workspace viewers (viewer seats are free and unlimited)

4. They can view that document with the mockup in their web browser (no need for them to have the Mac app,)

5. They can use our web inspector feature to download that mockup as an image in the format they need.