How to export photos from an ipad to a mac computer

Question

I have an iPad Retina on which I took approximately 350 screen grabs for my work.
(The screen grabs were made on the iPad with the home and lock buttons pressed together, I use them for app reports).
These screen grabs didn't go into the Photos folder called "Albums" when I saved them, but instead they were saved into a folder called "Photos" (in which are three sorting options, called "Years", "Collections" and "Moments").
I now need to put all these photos into a folder on my iMac and then delete them to clear up a working session.
But if I click more than 5 of them, the "mail" option disappears, and the remaining options are "Message", "Flickr", "Copy" or "Print".
"Message" didn't work, it seems to be designed to send text messages, but I could still manage to write an email address in the "to" field, and it didn't get through.
"Flickr" didn't work at all (the "+" sign to add a new account let me to a white pop-up window, I added an account from the Settings page, sent the photos to Flickr but they never arrived on the Flickr account).
"Copy" didn't work, I thought I could afterwards paste them into an email, but no luck there, it just crashed the mail app.
...and "Print", that seems to be far away from what I'm trying to do.
Airdrop cannot work between the iMac (pre OS X10.10) and the iPad. Flickr doesn't work either, at all.
When I use third-party apps like Dropbox, Instamail or any other WiFi photos sharing/exporting app, the only photos these apps can access are the ones in the photos folder called "Albums", and not a single one of the photos from the "Photos" album.
Also, as sad as it may seem, and as I've said earlier, the third-party applications I installed such as Dropbox are not an option when I select the photos in the roll and then click on "Share", but "Flickr" is...? Both "share" buttons, the one on top and the one to the right of each date give the same very limited results.
iTunes cannot do it. This iMac doesn't have iPhoto.
I was thinking about using a software like iExplorer to manually go dig into the root folders, but surely there has to be another way?

Answer 1

You should be able to do it with Dropbox.