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I created an application for the latest version of Mac OS X (Lion). My application uses ARC. I would however like it to be able to run on earlier versions of OS X.
My xcode says the earliest deployment target I can go is 10.4
By setting it to 10.4 does that mean I have done all that is required for my application to run on earlier versions of the OS up to 10.4?
Any help would be awesome thanks
There are a ton of API differences between 10.4 and Lion. Without seeing your app I cannot say for sure, but I would expect that it would not work correctly on 10.4 without some major changes. My suggestion is to forget about 10.4. I would be surprised if even 1% of OS X users are still running it. Stick with 10.6+ and you should be fine.
Whatever you do, only support versions that you have the ability to test on. If you don’t have the capability to test on 10.6 you might even consider just supporting 10.7. If you cannot test on all of your deployment targets then you are setting yourself up for some pain.