Can't open files due to permissions

When I create an rtf file in text edit on my laptop, send it to my iMac, and try to open it on my iMac, it says I do not have permission. This is a regular standard text edit file. Why is it's default set to this?

When I go under privacy and permissions, and set everything to "real and write" for all users and administrators, it still has the same problem. How can I move text files between computers and still be able to open them?