Runtime: Support OS X 10.9

[andschwa]

The widely popular Travis CI's OS X build machines run 10.9.5. While NuGet (in .NET CLI) recognizes the platform with the "osx.10.9-x64" moniker, unfortunately, .NET Core does not (yet) build packages for 10.9, thus resulting in errors from NuGet and a failed build.

Please consider supporting 10.9 (at least on a best-effort basis, provide runtime packages) so that we can officially expand our internal project's support matrix to OS X by continuing to use Travis CI.

[joshfree]

@andschwa 10.11 is our current minimum supported version of OS X. Older releases 10.9.x and 10.10.x are in limited "Security updates and printer drivers only" support from Apple.

[joshfree]

@akoeplinger I see your name in the travis-ci docs (https://docs.travis-ci.com/user/languages/csharp/) :smile: - do you know when travis-ci will upgrade their build machines to os x 10.11?

[MariadeAnton]

Sorry for the confusion!

Currently these versions are supported in Travis CI:

• Xcode 7.3 (OS X 10.11) – osx_image: xcode7.3
• Xcode 7.2 (OS X 10.11) – osx_image: xcode7.2
• Xcode 7.1 (OS X 10.10) – osx_image: xcode7.1
• Xcode 7 (OS X 10.10) – osx_image: xcode7
• Xcode 6.4 (OS X 10.10) – osx_image: xcode6.4
• Xcode 6.3 (OS X 10.10) – osx_image: beta-xcode6.3
• Xcode 6.2 (OS X 10.9) – osx_image: beta-xcode6.2
• Xcode 6.1 (OS X 10.9) – osx_image: beta-xcode6.1 – Default when no other osx_image: is specified

from: https://docs.travis-ci.com/user/languages/objective-c#Supported-OS-X-iOS-SDK-versions

[akoeplinger]

@joshfree I'm a co-maintainer of the community C# support in Travis, so I don't really have control over when they upgrade :)

According to the list María provided above it should be possible to switch your builds to an OSX supported by .NET Core (something I need to keep in mind for my plans of adding support for .NET Core alongside Mono on Travis, so thanks for the issue!).

[ghost]

@andschwa, you can add a key:

osx_image: xcode7.3

in your .travis.yml file, to use OS X 10.11.

Reference: https://github.com/search?q=extension%3Ayml+osx_image&ref=searchresults&type=Code&utf8=%E2%9C%93

[andschwa]

Ah I was one Google away from finding this last night! Thank you very much @MariadeAnton and @joshfree; setting said key enabled OS X 10.11, and now I just have to deal with dotnet restore and too many open files, but that was too be expected.

[andschwa]

And we're golden; matrix expanded to OS X :smile: