Here's Why:
Following inwards Microsoft's footsteps, Apple has started "pre-downloading" the latest version of its desktop operating system, macOS 10.12 Sierra, inwards the background, if yous are soundless running OS X El Capitan.
If yous bring automatic downloads enabled on your Mac, a large file of roughly 5GB volition mysteriously survive downloaded to your calculator inwards the background, using your Internet bandwidth for unrequested files.
Apple justifies this movement past times proverb that the automatic download would teach inwards easier for users to teach the newest operating system, encouraging them to update their Macs.
The proficient news, however, is that the update volition non install automatically without your permission.
Once downloaded automatically inwards the background, users who are running OS X El Capitan version 10.11.5 or after will have a notification that says macOS Sierra is cook to survive installed.
All yous ask to produce is exactly click the Install clit to teach started alongside the update.
Thankfully, the automatic update characteristic is smart plenty that it volition solely survive downloaded on Mac computers that bring an adequate amount of storage infinite together with encounter the specs for macOS Sierra.
So the Sierra installer volition survive deleted if the host Mac calculator starts running depression on storage.
"Apple is likewise beingness smart almost the download. If your calculator is depression on space, macOS Sierra volition non download," aggressively pushing Windows 10 installation since its launch, which caused a massive outcry.
How to Stop MacOS Sierra Automatic Download
However, the automatic update is soundless a fight annoying if yous bring no intention to update your Mac anytime soon.
If you're non cook to upgrade to the latest macOS or desire to download it later, yous tin exactly delete the Sierra installer manually to choke along from beingness prompted to produce the install.
To delete the Sierra installer, teach to Finder → Applications and thence await for an application called 'Install macOS Sierra' together with movement the application to Trash, together with Empty the Trash for leaving no delineate of the Sierra.
Your Mac could prompt yous for your Mac login password to consummate the inwards a higher house action.
But if yous don't desire a bulky 5GB update to survive downloaded to your calculator for start earlier yous boot off the installation, yous tin disable automatic downloads from the App Store to avoid the unwanted download.
To disable the feature, yous tin caput on to System Preferences → App Store → Automatically banking concern gibe for updates together with thence uncheck "Download newly available updates inwards the background."
That's it. You are done!
Now your calculator volition non automatically download macOS Sierra together with volition non prompt yous to install them. You tin opt dorsum into automatic downloads inwards the future.
