For the Mac OS, i just found a good (and free) resizing tool about a week ago. It's called PhotoToolCM. I had been using Photoshop, which works fine but it takes a long time for the program to open, and then i have to open the image file in Photoshop, and then go to "resize image" and then make another selection ("online") and then type in the size i want, and a couple more clicks, and finally i get my resized photo, but if it's not right, like still too big, or too small, then i have to do it again.
Finally, last week, after doing this for years, I did a google search for "mac OS resize", and i found a few programs, and this is the first one i tried, it got a good review in a macworld article. It's free, and it's so easy, it's a contextual menu plugin. I never use contextual menus, but i'm using this. You just control/click on an image file and a menu opens up with PhotoTool at the bottom, and you select it, and it opens and you choose the size you want for your photo, and that's it. it resizes your photo with a new name, with the original file unchanged. You can do one photo at a time, or you can change a whole batch of them at once.
freckles' mom, i still don't see yours. Apparently some can see it and some can't? i dont know why that would be.