How do I suppress the upgrade notification?

How do I make that notification go away for a week?

Is there a Snooze button? Click and hold to select a time to snooze.

Otherwise, clicking on the close button should make it go away permanently.

I've never seen the notification, so I'm not sure what options are available. I assume it is like any other.

I've read very bad things about upgrading to macOS High Sierra, and want to tell the notification to go away for (say) a week. Perhaps then the bugs will be straightened out.

What "bugs" have you been reading about that cause you concern?

I've installed it on a Mac Mini and MacBook Pro and haven't noticed any problems that affect me.

One option is to create a new partition (~30- 50 GB), install the new OS, and ‘test drive’ it. If you like/don’t like it it, you can then remove the partition. Do a backup before you do anything. By doing this, if you don’t like it you won’t have to go though the revert process.

Check to make sure your applications are compatible.

Application Compatibility

Applications Compatibility (2)

Also check to make sure there is a compatible driver for your printer.

Do a backup before installing, preferable 2 backups on 2 different drives.

There is a way to set that in Appstore, I don't exactly remember how. I think double click the HighSierra picture in the Updates window, and then say go away. After that you have to go to the featured page to find HighSierra.

There is no longer a way to hide/dismiss the upgrade notification easily. Follow the suggestion to download the installer; when the download is finished and the installer window appears, dismiss that. The installer will remain in your Applications folder. I've been able to get rid of the notification by doing that - the background process of the app store scans your drive and realizes that you have the installer - it will stop nagging you. You can leave your installer there until you are ready to install it; another good idea is to copy it to an external drive for safekeeping so you'll have a copy if you need it.

Unfortunately, that will not stop the nagging about upgrading to HS - which will still happen automatically even if you have the auto download turned off. The only way I've found is to download it and simply ignore it after that. The app store continuously scans your hard drive (as well as any attached external drives) to make available any updates, etc - having the installer, it will recognize that and stop nagging.

The Eric Root post is an acceptable solution then. I always download an upgrade or update, then move it to an external disk that I disconnect afterwards (otherwise the OS remembers where it is), and then aftwerwards I delete it and replace it with the later update.

Re: How do I disable the notifications for the upgrade to macOS High Sierra?

If all else fails, download the installer and quit it when it opens. That will give you a copy of the installer if you decide to try upgrading.