Problem seems to be on my iMac as I can't upload pix to any XenForo forum. Was able to. Problem only seems to be in uploading to XenForums, all the other programs (Outlook, Mail, Preview) can open and attach the files OK I open them from a zip file. Export them to another folder, renamed as Olympic1. jpg. I can view in any other program on the iMac, can upload to different mail programs but Xenforums "Upload a File" doesn't like them no on my forum, not on XenForo forum. It does seem confined to XenForo's "Upload a File". Any suggestions for trouble shooting?