Start-up and white screen issue after updating to v10.11.5?

I can't say 100% that my problems are related to the last update, but I thought I'd ask.

I've updated about 4 or 5 days ago, and although the questions did not begin immediately, they start after the update. It should be noted that I have never had issues like this before.

Here are some of my questions on my MacBook Pro (17 inch, early 2011), 2.2 GHz Intel Core i7, 8 GB at 1333 MHz DDR3, Intel HD 3000 512 MB graphics card

1. the monitor will sometimes go haywire and a strange split, screen where the mouse can go to the left side of the screen and reappear on the right side of the screen, because the office is now split into two

2. computer crashes and the monitor starts flashing to show a blue zigzag striped background

3 freeze during startup and never restart computer. Occasionally, it will start very well, but the computer locks upwards at some point while using

4 computer at boot flashing out to a white screen then restart never

Thanks for any help.

Now I'm starting to think my problems are related to a single user, sign in. Only 2 people use the computer and my connection seems to be fine. No crashes or anything like that.

The problems start when my wife logs in to his user account.

Thought I would mention it.

Any help/response would be appreciated.

Tags: Mac OS & System Software

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