In your Info.plist add:
<key>LSMinimumSystemVersionByArchitecture</key>
<dict>
<key>x86_64</key>
<string>10.6.0</string>
</dict>
Kevin
On Apr 8, 2010, at 7:21 AM, Oleg Krupnov wrote:
> Hi,
>
> While it's good for my app to run in 64-bit mode on Snow Leopard, it
> turns out not desirable on Leopard, because of the delay of loading
> all 64-bit frameworks (in case if my app is the first 64-bit app
> launched after system boot). It literally makes me wait for about ten
> seconds, and the performance gain of my app in 64-bit mode is
> definitely not worth it on Leopard.
>
> My app is assembled as a universal binary that supports 3
> architectures: 32-bit intel, 32-bit ppc and 64-bit intel. Obviously,
> the system chooses the best architecture it can run, which is 64-bit
> intel in case of Leopard.
>
> Is there a way to change that and force my app to run in 32 bit mode on
> Leopard?
>
> I would hate to have to supply two versions, one for Leopard and
> another one for Snow Leopard.
>
> Thanks!
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