# MacBook Pro update issue

**URL:** <https://boards.straightdope.com/t/macbook-pro-update-issue/726974>\
**Category:** Factual Questions\
**Created:** [August 4, 2015, 3:24pm UTC](https://boards.straightdope.com/t/macbook-pro-update-issue/726974 "2015-08-04T15:24:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Johnny\_L.A](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/johnny_l.a/32/1084_2.png) [@Johnny\_L.A](https://boards.straightdope.com/u/Johnny_L.A)\
**Post date:** [August 4, 2015, 3:24pm UTC](https://boards.straightdope.com/t/macbook-pro-update-issue/726974/1 "2015-08-04T15:24:28Z")

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A couple of weeks ago I tried to install an ‘important’ update on my MacBook Pro. I was warned that it _must_ be plugged into the mains, and not to interrupt power until the update was complete. So it goes through its normal thing, and comes up with a grey screen with a little ‘progress circle’ in the middle. It was taking forever. I left the computer on when I went to bed, and I still had the same thing when I got up in the morning. So I rebooted. Everything seemed normal.

For the last several days my (Safari) browser seemed to be running slowly. I decided to restart. When I did this, I got a message that an update needed to install. I could Abort or Continue. Before I could click Abort, I was back that grey screen. I had to reboot.

Whatever the update is, it’s not installing. It _might_ be causing my computer to run slowly. How do I cancel the installation?

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**Author:** ![Francis\_Vaughan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/francis_vaughan/32/3093_2.png) [@Francis\_Vaughan](https://boards.straightdope.com/u/Francis_Vaughan)\
**Post date:** [August 4, 2015, 3:45pm UTC](https://boards.straightdope.com/t/macbook-pro-update-issue/726974/2 "2015-08-04T15:45:17Z")

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The update is an EFI update - it is patching the boot ROM. This is why it must occur in the staged fashion. It is patching a security hole in the boot ROM that is worth fixing.

It may be possible to force a reloading of the update. This may fix the issues. [Check here](https://support.apple.com/en-au/HT201518).

It is possible to root around and remove the pending update, but I would really try to get it to install cleaning.