Kein Haswell? ich habe mir gedacht, du wolltest einen solchen.
Das wird der Grund sein:
PLEASE NOTE: Haswell CPUs and chipsets are not currently supported natively by OS X. We can't recommend Haswell systems yet, as there is no official support. Hence, please don't view this as buying advice. We don't recommend using an enhanced kernel for the long-term. The vanilla kernel is a much more desirable solution for a stable system.