10.13.2 (17C88)
Since upgrading to 10.13.2 (17C88) my iMac slows down after some time, the spinning wheel continues to spin until the whole machine is hanging. After restart everything is first alright but after a while it slows down again. First aid did not help either.
iMac (24-inch Mid 2007), Mac OS X (10.7.3)