If you've not done so, please try running a repair through your ESO launcher. If the update or repair still freezes at 9% you can also try the following.
Delete the ESO Launcher Folder
Open Finder, go to Applications, and then look for and delete the Zenimax Online folder.
The Launcher folder will be under the main ZOS folder.
Download a new ESO Launcher
Once you have deleted the folder, download the ESO Launcher from your account management page here to reinstall it. You can do this by logging in to your account on our website and clicking the Download Game button on the page for your appropriate platform.