[MB-10707]: Update latest readme for Mac version.

Change-Id: I8f430b801f117d53b256f8069c5410cf5400cb84
Reviewed-on: http://review.couchbase.org/35159
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>