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How to Disable Downloading of macOS High Sierra

See the MPG Mac wish list and MPG wishlists for computer gear at OWC.

See also Upgrading to High Sierra without APFS.

Open a Terminal window, and paste in the following (all of it including the trailing quote character):

cd /Applications; sudo echo "placeholderFileDisablesDownloading" > "Install macOS High Sierra.app"; sudo chflags uchg "Install macOS High Sierra.app"

cd /Applications; sudo echo "placeholderFileDisablesDownloading" > "Install macOS High Sierra.appdownload"; sudo chflags uchg "Install macOS High Sierra.appdownload"

What this does is create two small locked files with the same name as the installer and the temporary download filename, thus preventing macOS from downloading the installer into that location. There should be two locked files that look like this:

Dummied-out placeholders forestalling download or install of macOS HighSierra

When and if the time comes to upgrade to High Sierra, simply throw these two files in the trash, then proceed with the upgrade.

B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 4 hours unless noted. Certain deals may last longer.
$3097 SAVE $200 = 6.0% Nikon D850 DSLR in Cameras: DSLR
$1797 SAVE $200 = 10.0% Pentax K-1 Mark II DSLR in Cameras: DSLR
$998 SAVE $400 = 28.0% Sony a7 II Mirrorless in Cameras: Mirrorless
$1798 SAVE $200 = 10.0% Sony a7R II Mirrorless in Cameras: Mirrorless
$2798 SAVE $400 = 12.0% Sony a7R III Mirrorless in Cameras: Mirrorless
$3998 SAVE $500 = 11.0% Sony a9 Mirrorless in Cameras: Mirrorless

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