Re: Gracefully failing on unsupported OS version

FROM : Shawn Erickson
DATE : Mon Apr 18 20:05:46 2005

On 10.2.x I believe it displayed a dialog saying it isn't supported on 
this version of OS... I believe in 10.3 it was broken but it may have 
been fixed.

If not I think folks should spam bug-reporter with a defect since I 
expect that many many 10.4 only applications will be out in the near 
future and not having a good message show in 10.3.x is... well not 
good.

-Shawn

On Apr 18, 2005, at 11:00 AM, John Brownlow wrote:

> nope didn't try that, thanks
>
> what does it do if you use an earlier system?
>
> On Apr 18, 2005, at 1:56 PM, Shawn Erickson wrote:
>

>>
>> On Apr 18, 2005, at 10:43 AM, John Brownlow wrote:
>>

>>> My app is targeted at 10.4 and better. I know that whatever I do, 
>>> people are going to download it and try to use it on earlier 
>>> versions. I don't want to use an installer, just the 
>>> drag-to-Applications thing. However, as currently configured, on 
>>> pre-10.4 systems the app just fails to launch without a word of 
>>> explanation. The syslog shows that the cause of the crash is "failed 
>>> objc_getClass(NS**tigerOnlyClass**)"
>>>
>>> What's the nicest way of catching this problem without using an 
>>> installer? If the app won't launch in, say, 10.3, how can I tell the 
>>> user very politely that they need to upgrade if they want to use my 
>>> app?

>>
>> Did you try LSMinimumSystemVersion (not sure if Apple fixed it to 
>> give better feedback or not)?
>>
>> <http://developer.apple.com/documentation/MacOSX/Conceptual/

>> BPRuntimeConfig/Concepts/PListKeys.html#//apple_ref/doc/uid/20001431/
>> BAJDHACB>
>>
>> -Shawn