After apply the Security Update 2016-001 my iMac stop chiming at startup and experienced performance issues with Final Cut Pro X, any suggestions?
iMac (Retina 5K, 27-inch, Late 2015), OS X El Capitan (10.11.6)
Posted on Sep 2, 2016 10:46 AM
Q: Issues with Security Update 2016-001
First, reset the NVRAM. Instructions here > https://support.apple.com/en-us/HT204063
If that doesn't help, reset the SMC. Instructions here > Reset the System Management Controller (SMC) on your Mac - Apple Support