MacOSX-SDKs
10.1.5 - 10.15
A collection of those pesky SDK folders. Compiled from various releases of XCode.
If you don't need this entire repository, each SDK is available here.
Outdated versions: mediafire / mega.co.nz /
mediafire / mega.co.nz.
Important
Modern versions of Xcode (7.3+) need you to edit the MinimumSDKVersion in this file to use older SDKs:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Info.plist