Generally I include Juce on the Mac by setting a source tree for Juce in Xcode so that can do:
(I set the source tree to the folder containing the juce folder, normally I use JUCE_SOURCE for the source tree name.)
I then inlcude the source tree in the header search paths too. This makes sending projects to/from others easy once it’s set up the same on others’ machines (quite commonly students in my case).
In the new jucer, I can get the header search path to work via the debug/release but of course the “Juce Location” setting in the “Xcode (MacOSX)” tab needs to be relative or abolute. Any chance for a work around for this setting?