diff --git a/CHANGELOG.md b/CHANGELOG.md
index e3bbfa7..67b74f6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## v9?
 
 - We have moved the root check to the beginning of the script, and improved DEBUG handling with two different modes. `DEBUG=0` is still for production, and `1` is still for the DEBUG we previously knew downloading to the directory it is running from, but `2` will download to temporary folder, will detect updates, but will not install anything, but it will notify the user (almost as running the script without root before).
+- `LSMinimumSystemVersion` will now be honered, if the `Info.plist` in the app is specifying this. That means that an app that has this parameter in that file and it shows that the app requires a newer version of the OS than is currently installed, then we will not install it.
 - New variable `RETURN_LABEL_NAME`. If given the value `1`, like `RETURN_LABEL_NAME=1` then Installomator only returns the name of the label. It makes for a better user friendly message for displaying in DEPNotify if that is integrated.
 - Changed logic if `IGNORE_APP_STORE_APPS=yes`. Before this version a label like `microsoftonedrive` that was installed from App Store, and that we want to replace with the “ordinary” version, Installomator would still use `updateTool`, even though `IGNORE_APP_STORE_APPS=yes`. So we would have to have `INSTALL=force` in order to have the app replaced, as `updateTool` would be used. But now if `IGNORE_APP_STORE_APPS=yes` then `updateTool` will be not set, and the App Store app will be replaced. BUT if the installed software was not from App Store, then `updateTool` will not be used, and it would be a kind of a forced install (in the example of `microsoftonedrive`), except if the version is the same (where installation is skipped).
 - Added variable `SYSTEMOWNER` that is used when copying files when installing. Default `0` is to change owner of the app to the current user on the Mac, like this user was installing this app themselves. When using `1` we will put “root:wheel” on the app, which can be useful for shared machines.
diff --git a/fragments/arguments.sh b/fragments/arguments.sh
index d682862..6c01519 100644
--- a/fragments/arguments.sh
+++ b/fragments/arguments.sh
@@ -1,7 +1,8 @@
 # MARK: check minimal macOS requirement
 autoload is-at-least
 
-if ! is-at-least 10.14 $(sw_vers -productVersion); then
+installedOSversion=$(sw_vers -productVersion)
+if ! is-at-least 10.14 $installedOSversion; then
     printlog "Installomator requires at least macOS 10.14 Mojave."
     exit 98
 fi
diff --git a/fragments/functions.sh b/fragments/functions.sh
index 9d687bd..658be62 100644
--- a/fragments/functions.sh
+++ b/fragments/functions.sh
@@ -349,8 +349,7 @@ installAppWithPath() { # $1: path to app to install in $targetDir
         cleanupAndExit 5 "Team IDs do not match"
     fi
 
-    # versioncheck
-    # credit: Søren Theilgaard (@theilgaard)
+    # app versioncheck
     appNewVersion=$(defaults read $appPath/Contents/Info.plist $versionKey)
     if [[ -n $appNewVersion && $appversion == $appNewVersion ]]; then
         printlog "Downloaded version of $name is $appNewVersion, same as installed."
@@ -368,6 +367,21 @@ installAppWithPath() { # $1: path to app to install in $targetDir
         printlog "Downloaded version of $name is $appNewVersion (replacing version $appversion)."
     fi
 
+    # macOS versioncheck
+    minimumOSversion=$(defaults read $appPath/Contents/Info.plist LSMinimumSystemVersion)
+    if [[ $minimumOSversion =~ '[0-9.]*' ]]; then
+        printlog "App has LSMinimumSystemVersion: $minimumOSversion"
+        if ! is-at-least $minimumOSversion $installedOSversion; then
+            printlog "App requires higher System Version than installed: $installedOSversion"
+            message="Cannot install $name, version $appNewVersion, as it is not compatible with the running system version."
+            if [[ $currentUser != "loginwindow" && $NOTIFY == "all" ]]; then
+                printlog "notifying"
+                displaynotification "$message" "Error updating $name!"
+            fi
+            cleanupAndExit 6 "Installed macOS is too old for this app."
+        fi
+    fi
+
     # skip install for DEBUG 1
     if [ "$DEBUG" -eq 1 ]; then
         printlog "DEBUG mode 1 enabled, skipping remove, copy and chown steps"