Loading Picture from iMac

You can drag the photo from iphoto to your desktop. Then, when you make a post here, click the button for adding a photo and go to your desktop and select the photo that you dragged there from iphoto. Hope that works for you.

I use iPhoto.
I select to photos I want to upload in iPhoto, then select File > Export. You can export the photo(s) in either their original form or downsize them to a smaller size (.jpg) and resize to small, medium, or large. I choose Kind: .jpg, quality: high, and size: Medium. After you select Export, it'll ask you where on your computer you want to export them to. I made a Metal Detecting folder on my desktop and place them in there. Since the images in that folder are now all resized to medium, I can just upload from that folder.
Hope this helps.

From iPhoto go to File, Export.


When the dialog box opens up, choose Size, Custom and Max dimension, 700 pixels is a good compromise.


Once you export them to your desktop for example, then you can upload them to an image hosting website like ImageShack and then use the Direct Link URL to use as the image on your forum posting.

ImageShack


That's pretty much it. Then you can post all your images on the forum. Here is my son detecting as an example.

Regards, Tom