Compatibility testing - older versions of Mac OSX
We love supporting older versions of OSX in our own software. I still think, in some ways, Snow Leopard was the height of Apple's powers and I still keep a Mac on 10.6 for some day-to-day stuff.
But there are many reasons why it becomes difficult to support an older system. Maybe you want to use features in a newer OS. 3rd-party frameworks or libraries that you want to use will have minimum requirements, There's the garbage-collection / ARC minefield. But if you can build an app that runs on older systems and new, then you obviously need to test this out. And be able to reproduce any problems that your users are having.
So that means maintaining a number of installations of OSX.
That's where I might be able to help.
We have Macs here with versions of OSX going back to 10.2 (Jaguar) and can offer to run and test your app on 'real world' installations of the following systems, and carry out adhoc reproduction of issues with console logs or crash reports. All at a very reasonable hourly rate.
OSX 10.2 (Jaguar)
OSX 10.3 (Panther)
OSX 10.4 (Tiger)
OSX 10.6 (Snow Leopard)
OSX 10.8 (Mountain Lion)
OSX 10.9 (Mavericks)
OSX 10.10 (Yosemite)
OSX 10.11 (El Capitan)