Дженкинсу не удалось запустить git

Я установил Jenkins на свой Mac ( osx lion). Но мне не удалось заставить его работать. Это трассировка стека, которая у меня есть:

Started by user anonymous

Checkout:workspace / /Users/Shared/Jenkins/Home/jobs/test/workspace - hudson.remoting.LocalChannel@1c0a0847
Using strategy: Default
Checkout:workspace / /Users/Shared/Jenkins/Home/jobs/test/workspace - hudson.remoting.LocalChannel@1c0a0847
Cloning the remote Git repository
Cloning repository origin
Error trying to determine the git version: Error performing command: /usr/local/git/ --version
Cannot run program "/usr/local/git/" (in directory "/Users/Shared/Jenkins/Home/jobs/test/workspace"): error=13, Permission denied
Assuming 1.6
ERROR: Error cloning remote repo 'origin' : Could not clone git@coding-squirrel.de:iRest.git
ERROR: Cause: Error performing command: /usr/local/git/ clone -o origin git@coding-squirrel.de:iRest.git /Users/Shared/Jenkins/Home/jobs/test/workspace
Cannot run program "/usr/local/git/": error=13, Permission denied
Trying next repository
ERROR: Could not clone repository
FATAL: Could not clone
hudson.plugins.git.GitException: Could not clone
    at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:1046)
    at hudson.plugins.git.GitSCM$2.invoke(GitSCM.java:972)
    at hudson.FilePath.act(FilePath.java:783)
    at hudson.FilePath.act(FilePath.java:765)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:972)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1195)
    at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:571)
    at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:460)
    at hudson.model.Run.run(Run.java:1404)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
    at hudson.model.ResourceController.execute(ResourceController.java:88)
    at hudson.model.Executor.run(Executor.java:238)