ou can force Safari to open target = “_blank” links into new tabs rather than new windows by opening the Terminal and typing the following command:
defaults write com.apple.Safari TargetedClicksCreateTabs -bool true
Then restart Safari and from here on anytime you click a link targeted as _blank it will open in a new tab.
You can reverse this behavior and go back to the default new windows instead by typing:
defaults write com.apple.Safari TargetedClicksCreateTabs -bool false
