On Mar 29, 2011, at 10:15, Andy Lee wrote:

> On Mar 29, 2011, at 05:49 AM, Uli Kusterer <witness.of.teacht...@gmx.net> 
> wrote:
> 
> On 29.03.2011, at 09:22, Gabriel Zachmann wrote:
>> But when I put it in a DMG, some testers (not all) can't install it!
>> They get the error message "You cannot use the screen saver on this 
>> computer. Contact the developer ..."
> 
> If you didn't say it works when you distribute as a ZIP, I'd expect this to 
> be a case where you have built only a 32-bit screen saver, and these testers 
> have 64-bit Macs (Screensavers are plug-ins, and the system runs a 64-bit 
> screen saver engine, so screen savers must be 64-bit or can't be loaded into 
> the engine).
>  
> I found more info on this here 
> <http://developer.apple.com/library/mac/#qa/qa1666/_index.html> and here 
> <http://support.apple.com/kb/TS2913>. But yeah, it's odd that the same 
> bundle, bitwise identical, does work.
> 
> Are you sure you're building the application the same way for both cases? If 
> one's a debug build and the other is a release build, then that could explain 
> that you're not getting all architectures in one case.
>  
> Also, is there any commonality in how the users with problems are doing the 
> install? For example, are they double-clicking the bundle? What if they try 
> dragging it to ~/Library/Screen Savers?
> 
> When you send the bundle directly, do you tar it or zip it? I wonder if 
> there's something about the default permissions when you unzip something that 
> matters.
> 
> Admittedly I'm flailing, just wondering what the common element is.

You can also do a 'lipo <path to the binary> -info' to check which 
architectures are in the binary.

-Laurent.
-- 
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin                                 
http://www.nemesys-soft.com/
Logiciels Nemesys Software                                              
laurent@nemesys-soft.com_______________________________________________

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