One of my build servers is a VMware VM with 10.8 + Xcode 4 + Jenkins, which
lets me keep it isolated from whatever else I'm mucking with, and snapshots
between any changes.

--Jim


On Mon, Dec 15, 2014 at 12:46 PM, Jerry Krinock <[email protected]> wrote:
>
>
> > On 2014 Dec 15, at 08:44, Howard Moon <[email protected]> wrote:
> >
> > is this possible?
>
> I think this has been discussed in the list archives, and the answer is
> “yes” you can install older SDKs, etc., but it’s not any fun.
>
> > Or am I going to need completely separate project to support 10.10 from
> those supporting 10.6 and 10.7?
>
> That is one way to do it, and is the safest except if changes need to be
> merged.  Another alternative is to keep an older version of OS X with Xcode
> 4 on another Mac or partition, and open the *same* Xcode  project in Xcode
> 4, 5 or 6 over your local area network or whatever.  I’m not sure if you
> are considering to ship this “separate project”, or just use it for
> debugging.  In either case, you would duplicate your *target*, for example
> “MyApp” to “MyApp-Legacy”, and change its SDK, etc.  I did that for a time,
> with only one or two glitches.
>
> Whatever you do is going to be tricky.  I hope you have a good QA script
> which can check your products for build issues.
>
>
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