I would like to crop my photo's as circles or ovals without having to buy Photoshop. Is it possible in Aperture? I schoot and edit in raw.
Aperture only crops rectangular selections, sorry - it does not support alpha channels, that would be required for transparency and arbitrary shapes.
Try the free GIMP - it can do similar things to Photoshop.
If you have the iWorks apps - Pages, Keynote, you can use the masks to crop your photos to arbitrary shapes.
iBook Author is also free and lets you add masks to images (add a shape and use image fill).
This was asked not to long ago and the one installed app we aways forget about Preview came to the rescue!
Preview can do a ton of things that you never think about, thisis one of those.
Message was edited by: Frank Caggiano - If you try out GIMP make sure you get the latest version for OS X. It now runs native. Previous versions ogof GIMP for Mac required X11
This was asked not to long ago and the one installed app we aways forget aboutPreview came to the rescue!
LOL, Frank! Preview was the first application I checked, believe it or not!
But I let myself be tricked, because the "Tools" drop-down menu only shows "Rectangular selection". You really have to setup the toolbar icons "View > Show Edit Toolbar" to discover the "Circular selection" icon. Preview hides its secrets very well!
I am only wondering how it will effect the quality of my picture.
That will depend on the quality you use to export from Aperture to Preview, and also on the quality you use to save from Preview. Export at the best quality you need for the purpose you want the photo for.
The basic idea is to use the "elliptical selection" from the "Edit Toolbar", then drag the mouse across the rectangular area that contains your ellipse/circle and then copy the selected area to the clipboard. Now create a new image (File > New from Clipboard) and this will create a new photo with transparent background. Then save this image in a format that supports transparency - tiff or png.