What photo organizing software can do this?

All my art is digitized in thousands of images on my Mac.

When a manufacturer wants images I literally spend hours searching for the largest version of the image when there are often up to 20 versions of the photo.

I am willing to pay for good software that will make my life easier so price is not a deterrent.

I checked the archives to no luck here. So I am hoping to get recommendations to buy the right program from fellow flutherites.

Here is ideally what it needs to do:

1. Search my entire computer for images of a certain size and be able to save copies of them in a master file.

2. This master file needs to be editable- I need to remove non- art files from it so it is just the work I need to search and not the family camping trip.

2. Show thumbnails so I can see the images. (my file- naming system is as poor as my organizing skills.

I have used finder to get a large file database but cannot edit it

Any suggestions will be explored! Many thanks!