Mac icon specifications

Mark Schonewille m.schonewille at
Wed Aug 20 12:45:12 EDT 2008


The 512^2 icons are specific to Leopard and Snow. It is indeed  
possible that other versions of OSX can't cope with this, but Leopard  
and Snow shouldn't have any problems with this.

Best regards,

Mark Schonewille

Economy-x-Talk Consulting and Software Engineering

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On 20 aug 2008, at 18:42, J. Landman Gay wrote:
> This is a limitation in Icon Composer, which only offers a few basic  
> sizes. 128 pixels is the largest it allows. The Finder will scale  
> the icon if necessary, but 128 is the largest size that Icon  
> Composer will save in the icns file. It's limitations have never had  
> any ill effects in my icon files though, the Finder works fine with  
> 128 px.
> Now that I think about it, I wonder if having huge icon sizes in the  
> icns file is what's messing up everything. I've never created a Mac  
> icon with a stored image larger than 128. Maybe just the existence  
> of extra images gives the Finder a heart attack?

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