The Mail.app in Mac, by default, adds the image attachments as inline in the email message. This could be very much annoying, sometimes, when we need to send a bigger sized images as such.
There's no straight way, in settings, to disable this. But we can use command-line for this. Here's the command for it.
Quit your Mail.app before you try this command on Terminal
defaults write com.apple.mail DisableInlineAttachmentViewing -bool yes
If you would like to revert back to inline image attachment
defaults write com.apple.mail DisableInlineAttachmentViewing -bool no
