Hi I've updated my Windows 10 running through bootcamp the other day. The update required the iMac to restart a couple of times, while installing the new Windows update. However, things are acting strange in OSX since. I've tried updating to Sierra as well, but no fix on the issues. Here's what happens - Mail is unable to read emails, and the programme will freeze shortly afterwards - Safari is unable to read websites, just shows blank white screens. Also freezes at some point. - Sometimes, everything in my dock will just bounce up and down when i try to open a programme. - At some point, everything i open will not respond and gives me the message "Can't open *programme* because the *programme* is not responding" All this happens at random times. But always aften the iMac has been shut down. Sometimes when i boot, everything is running fine. Other times, it's completely useless. I have a 5K 27-inch late 2015 iMac fully maxed out.