Allow Third Party Cookies on Mac: Full Guide

Third-party cookies on a Mac are small data files placed by a website other than the one you’re currently visiting, often from embedded ads, videos, or social media widgets. Whether you should allow them depends on your browser and your privacy preferences: Safari blocks them by default, while Chrome and Firefox give you explicit controls. This guide explains exactly where those settings live in each browser, what the trade-offs are, and how to manage them safely.

What Are Third-Party Cookies?

Cookies are text files that websites store in your browser to remember information about you. A first-party cookie comes from the site you’re directly visiting (e.g., example.com setting a cookie while you’re on example.com). A third-party cookie is set by a different domain than the one in your address bar. For instance, if a news site embeds a “Like” button from a social network, that social network may drop a cookie on your Mac even though you never visited its site.

These cookies are the backbone of online advertising—they let ad networks track you across multiple sites to build a profile of your interests. They’re also used for some legitimate functions like single sign-on (logging into a site via Google or Facebook) and embedded content that needs to remember your preferences.

How to Allow Third-Party Cookies in Safari

Safari is the default browser on Mac and has the strictest cookie policy. It blocks all third-party cookies by default, and Apple has made it difficult to turn them on because the setting is hidden. Here’s how to find it:

1. Open Safari and go to Safari > Settings (or press Cmd + ,).
2. Click the Privacy tab.
3. Uncheck “Block all cookies” (this is actually a first-party cookie setting, not third-party).
4. Now go to the Advanced tab and check “Show features for web developers” at the bottom.
5. A new Develop menu appears in the menu bar. Click Develop > Disable Cross-Origin Restrictions.

This last step effectively allows third-party cookies, but it also disables other security protections like Cross-Origin Resource Sharing (CORS) checks. It’s a blunt instrument meant for developers testing websites, not for everyday browsing. Apple’s stance is that third-party cookies are a privacy threat, so they’ve made it intentionally hard to enable them.

How to Allow Third-Party Cookies in Chrome

Chrome on Mac gives you a more granular control. As of recent versions (Chrome 80+), third-party cookies are allowed by default, but you can change that. Here’s the path:

1. Open Chrome and click the three-dot menu in the top right.
2. Go to Settings > Privacy and security > Cookies and other site data.
3. Under “General settings,” you’ll see options: Allow all cookies, Block third-party cookies, or Block all cookies.
4. Select Allow all cookies to permit third-party cookies.

You can also add exceptions for specific sites by scrolling to “Sites that can always use cookies” and clicking Add. This is useful if you want to block third-party cookies globally but allow them for a site you trust, like your bank or a streaming service.

How to Allow Third-Party Cookies in Firefox

Firefox has a middle-ground approach called “Enhanced Tracking Protection.” By default, it blocks third-party cookies that are used for tracking, but allows them for sites you interact with. To change this:

1. Open Firefox and go to Settings (gear icon or Cmd + ,).
2. Click Privacy & Security in the left sidebar.
3. Under Enhanced Tracking Protection, choose Custom.
4. Check the box for Cookies and then select All third-party cookies from the dropdown.
5. Alternatively, choose Cookies from unvisited sites to block only those from sites you’ve never visited.

Firefox also lets you add exceptions by clicking the shield icon in the address bar and toggling protection off for that specific site.

Should You Allow Them? Pros and Cons

Allowing third-party cookies has both benefits and drawbacks. Here’s a quick breakdown:

• Pros: Smoother login experiences (e.g., “Sign in with Google”), personalized ads that are more relevant, and fewer “please accept cookies” pop-ups on some sites.
• Cons: Your browsing activity is tracked across many sites, which can feel invasive. This data can be used for targeted advertising, and in some cases, it can be exposed in data breaches.

Most privacy advocates recommend blocking third-party cookies, as the tracking outweighs the convenience for most people. First-party cookies (like remembering your cart on Amazon) are generally harmless and necessary for the web to function.

Common Problems and How to Fix Them

If you’ve allowed third-party cookies but still see issues, here are common culprits:

• Site still says cookies are blocked: Your browser’s “block all cookies” setting might be on, or an extension like an ad-blocker is interfering. Check your extensions and disable them temporarily.
• You’re logged out frequently: This is usually a first-party cookie issue, not third-party. Make sure you haven’t blocked all cookies.
• Embedded videos or forms don’t load: Some sites use third-party cookies for authentication. Try adding the site to your exceptions list in Chrome or Firefox.
• Safari’s “Disable Cross-Origin Restrictions” doesn’t stick: Apple resets this setting after a few days for security. You’ll need to re-enable it if you’re testing.

Privacy Alternatives to Third-Party Cookies

If you want to limit tracking without breaking websites, consider these alternatives:

• Use a privacy-focused browser: Brave or DuckDuckGo block third-party cookies by default and have built-in tracker blocking.
• Install a tracker blocker extension: uBlock Origin or Privacy Badger can stop third-party cookies while allowing first-party ones.
• Use Safari’s built-in protections: Safari’s Intelligent Tracking Prevention (ITP) already limits third-party cookies more than any other browser, so you don’t need to do anything.
• Clear cookies regularly: Go to your browser’s settings and clear cookies and site data weekly to reduce the profile built on you.

Frequently Asked Questions

Will allowing third-party cookies slow down my Mac?

No, cookies themselves don’t affect performance. However, more cookies mean more data stored on your hard drive, which is negligible. The slowdown you might notice is from the ads and trackers themselves, not the cookies.

Does Safari block third-party cookies on iPhone too?

Yes, Safari on iOS and iPadOS also blocks third-party cookies by default, and there’s no developer setting to disable it on mobile. You’d need to use a different browser like Chrome if you want to allow them.

Can I allow third-party cookies for one site only?

Yes, in Chrome and Firefox you can add site-specific exceptions. In Chrome, go to Settings > Cookies and other site data > Sites that can always use cookies, and add the URL. In Firefox, click the shield icon in the address bar and turn off protection for that site.

Are third-party cookies being phased out?

Yes, Google has announced it’s phasing out third-party cookies in Chrome, though the timeline has been delayed multiple times. Safari and Firefox already block them by default. The industry is moving toward alternatives like Google’s Topics API and the Privacy Sandbox.

What’s the difference between “block all cookies” and “block third-party cookies”?

Blocking all cookies disables both first-party and third-party cookies, which will break many websites (you’ll be logged out everywhere, and some sites won’t load properly). Blocking only third-party cookies is a more targeted privacy measure that preserves the core functionality of most sites.

Related

• Do Museum Visitors Leave Chemicals on Artwork? Study Findings
• Dim a 3-Way Switch From Both Locations?
• Star Wars Zero Company: Best Turn-Based Squad Tactics?