since my Chrome Extension didn't work under Mac I broke the code down and found the problem:
background.js
chrome.browserAction.onClicked.addListener(function(tab){
    alert("Goin to");
    chrome.tabs.executeScript(tab.id, {file: "script.js"});
});
script.js
$('#Hoster_30').trigger('click');
alert("Clicked");
jQuery is loaded and both alerts are shown, but the click event isn't triggered. It works fine when I directly enter the trigger in the js console on the page and under Windows it also works in the add on.
Here my manifest.json
{
    "name": "MacAddon",
    "version": "0.1",
    "permissions": ["tabs", "http://*/", "https://*/"],
    "background": {
        "scripts": ["background.js"]
    },  
    "browser_action": {
        "default_title": "MacAddon"
    },
    "content_scripts": [
    {
      "matches": ["http://*.kinox.to/*", "http://*.streamcloud.eu/*"],
      "js": ["jquery.js"]
    }
    ]
}
 
     
    