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Seashore is an open source image editor for Cocoa. It features gradients, textures and anti-aliasing for both text and brush strokes. It supports multiple layers and alpha channel editing. It is based around the GIMP's technology and uses the same native file format.

What's New

Version 0.5.1:

  • Corrected an issue where color spaces were not always respected.
  • Fixed an issue where some plugins would crash or not respect alpha transparency.
  • Fixed a problem where certain files (such as PDF) could not be opened.
  • Worked around a problem where certain color pickers would cause Seashore to crash at startup.


Mac OS X 10.4.11 or later

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Seashore User Discussion

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Liliannaw9135 Member IconReview+1

MyBrushes is better

Reply0 replies
Version 0.5.1
Penguirl Member IconComment+1057

I had never tried Seashore because I mistakenly thought it did not have a crop feature. There is no crop button in the tool palette, it is listed in the edit menu instead.

A promising looking app that I look forward to using.

Reply0 replies
Version 0.5.1
Detto Member IconReview+29

Finally found a image creation / manipulation tool for the "you and me" with a simple interface and the extra features one might miss by using Paintbrush or another Paint clone.
Excellent work! Highly recommended!

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Version 0.5.1
Macwatcher Member IconReview+0

It's a great little free bit of software, very pretty, and also quite easy to use once you get the hang of one or two little tricks.

I did manage to crash it a couple of times, mainly when I tried to use Transform on a selection rather than a layer, but otherwise it's stable enough.

There are a couple of serious omissions though. Although you get Exposure, and Hue/Saturation, you don't get Levels, or Colour Balance, both of which I think absolutely essential in any layer-based image editor.

But, for a free app, it's neat. Just make sure you download the 0.5 Beta, not 0.1 which has far less in it.

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Version 0.1.9
Belov Member IconReview+0

Great application, considering the price. The one-window interface and mac-likeness draw me to use it. Instead of waiting for X11 to launch. Some 10-15 minutes of fiddling and You find all the basic tools and effects...furry, blurry, hurry...Is that your mother?
Both drawing tablets, Graphire4 & Intuos4 worked "out of the box."

Biggest bug : Tablet eraser does BG color.

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Version 0.1.9
Mugsuk Member IconReview+60

Check out version 0.5 at the following link...

it is unbelievable that such awesome software is so readily available for free... may lack a few filters that you will find in things like pixelmator, but this is the most mac-like graphics program I have used in term of ease of use.

Hope they keep up the development as this program is one of my most used programs on a daily basis - especially since the new version came out.


Reply1 reply
Version 0.1.9

Wow. I didn't even realize Seashore was still being developed. Thanks.

M-Rick Member IconComment+152

Try LiveQuartz http://www.macupdate.com/info.php/id/18064

More features, more Mac OS X

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Version 0.1.9
globetrotterdk Member IconComment+0

I get a "too many processes" error message when I try to open the image file.

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Version 0.1.9
Tomis Member IconReview+117

I've been watching Seashore develop. I keep hoping they'll add more of Gimp's effects.

I've become addicted to live previews in other apps, I hope they'll add it to Seashore.

Overall a good little app if you don't need all the power of a Photoshop or Gimp.

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Version 0.1.8p3
hced Member IconReview+171

Not too bad. I think Seashore has potential!

Here are my wishes for improvement:

- Alt-dragging to automatically duplicating selection (á la Photoshop).

- Realtime transparency interaction. I.e., be able to show (in realtime) when you change a layer's transparency.

- Command-+/- for zooming.

- Scroll-wheel support for zooming.

- Option to not let the screen dim when you make a selection. Plus, alternatively adding an option to use a more 'conventional' type of marquee (again, á la Photoshop).

- More enhanced gradient editor.

- Do I dare asking? Bezier-curves/simple vector gfx support? :)

Good luck! And thanks so far!

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Version 0.1.8p3
user icon+1
Version 0.5.1
user icon+222
Version 0.5.1
user icon+0
Version 0.1.9
user icon+2
Version 0.1.9
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Current Version (0.x)


Downloads 81,624
Version Downloads 29,709
License Free
Date 19 Mar 2011
Platform OS X / PPC 32 / Intel 32
Price Free