Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
- Subject: Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
- From: Kevin Wojniak <email@hidden>
- Date: Thu, 8 Apr 2010 08:57:08 -0700
Are you launching with NSTask or some other variant? If so it won't work. You need to use Launch Services instead. I think there are some low-level APIs to use to launch with a specific architecture, but if you can use LS it handles all the dirty work for you.
On Apr 8, 2010, at 8:53 AM, Oleg Krupnov wrote:
> This would be a perfect solution, but I've found that on Leopard, this
> key seems to be ignored, the system still launches my app in 64-bit
> mode (via Finder).
>
> What may I be doing wrong?
>
> Thanks!
>
> On Thu, Apr 8, 2010 at 7:28 AM, Kevin Wojniak <email@hidden> wrote:
>> 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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