** BUILD FAILED **

[keler14]

Making /Users/piotrkeler/Desktop/postgresql/tar/postgresql-9.4.0.tar.gz
Output to /Users/piotrkeler/Desktop/postgresql/build/Release
Using openssl libraries: /Users/piotrkeler/Desktop/postgresql/build/Release/openssl-current-mac_x86_64
SDK does not exist: macosx10.10
Command /bin/sh failed with exit code 255

** BUILD FAILED **

The following build commands failed:
PhaseScriptExecution Run\ Script build/postgresql-kit.build/Release/postgresql_mac.build/Script-6E256FF415F255D00079AD2D.sh
(1 failure)

[sebastianmach]

You can resolve that by opening the postgresql-kit.xcodeproj project in Xcode and change the Base SDK of all targets to Lates macOS (macOS 10.XX) (see image)