I can't seem to find an option to enable guests to view attached images.

When logged in will show the image in the post.

When not logged in you get:
Attached File image.jpg (8K)
Number of downloads: 0

Clicking that as a guest gives you:
[#10171] You do not have permission to view this attachment.

I would like the attach images to be shown as if the guest was logged in. Is there a way to do this?

You have to give guests "download" permissions in the forum in question.

Ah, thank you, didn't even cross my mind to look under permissions.
Was trying to search for attachments / uploads.