The issue is caused by Gatekeepr. It uses "path randomization" to run applications, until the user moves the app in it's final destination (/Applications for example). This causes the app to be run from /private/var/.. and Dock treats this as a new app.

To remove the quarantine attribute execute (removes recursively com.apple.quarantine):

sudo xattr -dr com.apple.quarantine /Application/SomeApp.app

Recursion (the -r flag) may be needed for apps that contain helpers.

To list the current attributes for an app execute:

sudo xattr /Application/SomeApp.app

Sources:

On Gatekeeper and the Lifespan of Little Snitch Rules

The issue is caused by Gatekeeper. It uses "path randomization" to run applications, until the user moves the app in it's final destination (/Applications for example). This causes the app to be run from /private/var/.. and Dock treats this as a new app.

To remove the quarantine attribute execute (removes recursively com.apple.quarantine):

sudo xattr -dr com.apple.quarantine /Application/SomeApp.app

Recursion (the -r flag) may be needed for apps that contain helpers.

To list the current attributes for an app execute:

sudo xattr /Application/SomeApp.app

or

ls -l@d /Application/SomeApp.app

Sources:

On Gatekeeper and the Lifespan of Little Snitch Rules

The issue is caused by Gatekeepr. It uses "path randomization" to run applications, until the user moves the app in it's final destination (/Applications for example). This causes the app to be run from /private/var/.. and Dock treats this as a new app.

To remove the quarantine attribute execute (removes recursively com.apple.quarantine):

sudo xattr -dr com.apple.quarantine /Application/SomeApp.app

Recursion may be needed for apps, that contain helpers.

To list the current attributes for an app execute:

sudo xattr /Application/SomeApp.app

Sources:

On Gatekeeper and the Lifespan of Little Snitch Rules

The issue is caused by Gatekeepr. It uses "path randomization" to run applications, until the user moves the app in it's final destination (/Applications for example). This causes the app to be run from /private/var/.. and Dock treats this as a new app.

To remove the quarantine attribute execute (removes recursively com.apple.quarantine):

sudo xattr -dr com.apple.quarantine /Application/SomeApp.app

Recursion (the -r flag) may be needed for apps that contain helpers.

To list the current attributes for an app execute:

sudo xattr /Application/SomeApp.app

Sources:

On Gatekeeper and the Lifespan of Little Snitch Rules