I'm writing a Mac app in XCode 4 which works perfectly in Lion. However if someone tries to use it on Leopard it doesn't run and says it needs Lion. How can I make my project backwards compatible? Thanks in advance!
You need to build against the 10.5 SDK (set [SDKROOT] to 10.5) and set the minimum system version [MACOSX_DEPLOYMENT_TARGET] to 10.5.
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I'm on El Capitan in XCode 7.3.1 and Swift 2 trying to make my mac application work on Yosemite (it just doesn't open at all with no crash logs).
I have 10.10 set as the deployment target, but that didn't change anything.
I downloaded Xcode 6.4 on another machine and loaded the project and it's complaining a ton about all of my swift code not being a thing.
I'm assuming (hoping) I don't have to figure out how to write this in an old version of Swift in order to make it work on Yosemite.
How do I know which features of the new SDK need to be made backwards compatible?
I can't install Xcode 4. I have some files that I need to open in Xcode 4. However, when I try to install it, it says "Xcode Install Assistant cannot be installed on this disk. The version of OS X is too new." How can I make it think I'm on Lion or Mountain Lion?
Here is a picture:
Download it in the App Store - it's the newest version and looks like the disc you have doesn't support Mavericks.
I feel tired of these preposterous answers. I think that if you want to stick to an older version of something, you should be able to. Also, I don't think software like XCode 4 are that old anyway.
But, to the point: I think XCode 4.6.3 is compatible with Mavericks. I am not sure about previous 4.6.X, but I think none of them work.
Any versions prior would require a previous operating system. I think you could try using pacifist to install the version you want, but I haven't found any guides.
If your problem is with project compatibility, in XCode 5 there is an option to save the project in a way it is compatible with XCode 4.6, and I suppose 4.6 offers a similar option to save in a version prior. Of course, you may need to adapt the code of the projects accordingly. Usually I try to stick with the Snow-Leopard-compatible code, because it compiles fine in all XCode 4.X and 5.X versions.
You can download any of these from the developer website.
I would try partitioning the disk and installing an older Mac OS X. I work with Snow Leopard and Mavericks in the same Mac. I usually do interface tasks in SL and the rest on Mavericks. The other advantage is that I have both XCode 4.2 and 3.2.6 in the same machine, so I can manage some backwards compatibility. =D
The New Features in XCode 5 Section says that
Xcode 5 requires a Mac running OS X v10.8.
Also the Compatibility Sections states that XCode 5 requires at least OS X 10.8.
Is there a way to install XCode 5 on a Macbook Pro (Core 2 Duo) running OS X 10.7?
No you cannot, least version for installing XCode 5 is 10.8.4
That does not give you ability to compile or simulate iOS7. Sometimes people are able to get the required libraries or installer to run on the older versions of MacOS... if anyone has any luck please share :)
use older versions of Xcode. :) Like 4.6 for example.
I work on Mac 10.6 because I don't want to lose spaces to Lion. It's an extremely efficient part of my workflow. And I program for the iPad and need to write for iOS 5.1 and the new retina display, but for some reason apple has made the new Xcode only available for Mac 10.7 or later.
How can I either install the new Xcode, find a workable Xcode, or somehow install iOS 5.1 support into my current Xcode? (4.0.1)
You can not do that without cheat with Apple, you need to stay up to date !
It is not possible, you have to upgrade. Xcode 4.3 is coded with innovations that will only work on OS X Lion.
The cap was Xcode 4.2 that ran on SL. You will have to upgrade or continue only developing for older, legacy iOS versions (not a good option).
I am new here and new in Xcode world.
I made a simple app with Xcode 3.2 on Snow Leopard.
The resulting built app works on snow leopard, however it will not even start on leopard (10.5.8) - I get message "You cannot use this version of application with this version of Mac OS X". Is it normal?
Or is there a way to make app that will work both on Snow Leopard and Leopard? Please advise, as I have no way to find out myself
Thanks for any input
You need to change the deployment target in your Build Settings. You should set it to the lowest version of OS X that you're willing to provide support for. You should set your base SDK to the latest available public SDK.
If you do this, you must ensure that you only use new 10.6-only APIs after doing runtime checks for their existence. To do this, you can use functions like NSClassFromString and respondsToSelector:.
Any Frameworks or libraries that are new to 10.6 should be weak-linked. This will prevent the app from trying to load those frameworks on 10.5 and thus cause the program to crash when it doesn't find the frameworks.
All explained in the SDK Compatibility Guide from Apple (Requires (free) login).