On shut down, popup appears to ask if I want to abort installation

Thanks Jack!

I searched for "Reset Search" in Spotlight (with Application as a filter, click that little plus icon to the right to filter the search) and then used AppZapper to completely remove it. Now, no lame "Abort Install" dialogue on restart or shutdown.

Happy New Year!

I Have the same problem. It's quite annoying, but I don't think I have installed any malware

Same problem. Was experiencing with Mtn Lion, and hoped it would go away with Yosemite install - it didn't. I hope it's not some sort of virus...

I have the same problem on my imac running 10.9.3

Today I clicked abort and it shutdown nnormally

I have not noticed anything weird happening with my mac

I am hoping its not some type of virus.

I too have this issue...started last week. MacBook retina 13" Mavericks...cannot seem to find a way to get rid of this at all......makes me very nervous that something horrid is trying to get in....arrgghh. Any hints most welcome!

I've tried launching "Apps" and checking for updates. It seems that the "abort install" goes away after installing updates... must be an Apple reminder to check for updates.

If you have your Preferences checked to allow update downloads to occur in the background, that is most likely what is happening. Check your settings here:

System Preferences > Software Update

If you have everything checked, it is probably in the middle of downloading an update when you're trying to shut down (obviously the system doesn't know that you are wanting to shut down...).

I wish I was 100% sure this was it but everything for my updates is turned off...it is possible that I may have started to update something and it didnt finish. I haven't noticed it as of lately, since the last time I clicked "abort" but like I said all my update settings are unchecked and nothing automatically downloads or processes in the background. Hopefully your answer helps someone.

Have you gone to the app store and checked your Updates section just to make sure there are none listed there?

Hi, yes, I have done all of the above. There are no obvious apps awaiting update, or partially updated/paused update.

There are three incompatible updates....they are all for Yosemite. So still a mystery I'm afraid

Im having this too... Im also afraid its something very weird trying to install. this makes no sense.

This is a photo of the pop-up

And by clicking yes, this happens...

It was only happening on my mac on shut-down, but has tonight just appeared on it's own. Haven't selected abort, as had reluctantly done that on shut-down and all that happened was it shut down. Not game to press it now!!

Happeneing to me to.. the same as the first picture. asking about installing or abort.

I tried re do ing the latest adobe flash players installer and for a few shut downs and what not all was good.

Im thinking theres a link to that updater?

anyone else?