12 Fixes for When Safari is Running Slow on Your Mac

There‘s nothing more frustrating than a web browser that takes forever to load pages. If Safari has been crawling at a snail‘s pace on your Mac lately, don‘t despair. As a Mac technician who troubleshoots performance issues on a daily basis, I‘m here to help. Safari slowdowns are very common, but luckily, they‘re also easy to diagnose and fix in most cases.

In this guide, I‘ll walk you through the most frequent causes of a sluggish Safari browser and provide clear, step-by-step instructions for getting it back up to speed. Whether you‘re a beginner or a seasoned Mac user, you‘ll find effective solutions here to help make your web browsing fast and smooth again. Let‘s get started!

Reasons Why Safari Can Run Slow

Before we jump into fixes, it‘s helpful to understand some of the underlying issues that can drag down Safari‘s performance. Here are the most common culprits I see:

• Slow or inconsistent internet connection
• Outdated version of macOS or Safari
• Too many tabs open at once
• Problematic or excessive browser extensions
• iCloud Private Relay or other iCloud features
• Incorrect DNS server settings
• Issues with the startup disk or SSD
• General system junk and clutter

Some of these, like iCloud features, are unique to Safari. But many are the same factors that can impact performance in any browser. Identifying which one(s) are bogging down Safari in your case is key to finding the right solution.

Step 1: Rule Out Internet Connectivity Issues

The first thing to check is your internet connection:

1. Visit a site like speedtest.net to verify your download/uploads speeds
2. Make sure your modem/router is functioning properly – check the indicator lights and the manual if unsure
3. Disconnect other devices from your network that you aren‘t actively using to free up bandwidth

If you‘re seeing normal speeds and no issues with your networking hardware, move on to the steps below. But if your connection is weak or inconsistent, you‘ll want to troubleshoot that first, as it will impact Safari no matter what else you do.

Step 2: Update Safari and macOS

Running an outdated version of Safari or macOS can lead to serious performance issues. Apple regularly provides updates that include bug fixes, security patches, and speed improvements. Here‘s how to make sure you have the latest:

1. Click the Apple menu and select "System Settings" (or "System Preferences" on older macOS versions)
2. Go to General > Software Update
3. If any updates are found, click "Update Now" and let them install
4. Restart your Mac if prompted

After updating, open Safari and see if the speed has improved. If not, continue with the remaining steps.

Step 3: Manage Tabs and Extensions

Having too many tabs open is an easy way to slow Safari to a crawl. Each one consumes system resources, and the more you have going, the more bogged down your browser and your Mac become. The same is true for extensions – helpful as they can be, having too many can be a major drag on performance.

To get things running smoothly again:

1. Close out all unnecessary tabs, keeping only the ones you‘re actively using
2. In Safari, go to Preferences > Extensions
3. For any extensions you don‘t recognize or rarely use, uncheck the box to disable them, or select and click Uninstall to remove entirely
4. Consider using a tab management extension like OneTab to quickly consolidate open tabs

Aim to keep your number of active tabs and extensions to a minimum. Not only will Safari run faster, but you‘ll likely find it easier to navigate and get things done.

Step 4: Disable iCloud Private Relay

If you subscribe to iCloud+ and have Private Relay enabled, your browsing activity in Safari gets routed through two secure relays in order to mask your location and identity. While great for privacy, this process can sometimes slow down your browsing. Here‘s how to turn it off:

1. Open System Settings and click your name at the top
2. Select iCloud > Private Relay
3. Toggle the switch to the off position
4. Click "Turn Off Private Relay" when prompted

You can always re-enable this feature later. But if you‘re more concerned with speed than privacy, leave it off.

Step 5: Adjust DNS Settings

Safari and other browsers rely on DNS servers to translate domain names (like apple.com) into IP addresses. By default, your Mac will use the DNS provided by your ISP or router. But sometimes, these servers can be slow or have issues that bog down browsing.

To switch to a faster, more reliable DNS, like Cloudflare or Google:

1. Go to System Settings > Network
2. Select your connection (Wi-Fi or Ethernet) and click Details
3. Select DNS in the left sidebar
4. Click the Add (+) button and enter the IP address of your preferred DNS server (e.g. 1.1.1.1 for Cloudflare or 8.8.8.8 for Google)
5. Click OK to save the changes

After updating your DNS, flush your cache to clear any outdated data:

1. Open Terminal (in Applications > Utilities)
2. Type the following command and press Enter:
   sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
3. Enter your admin password when prompted

Restart your Mac and open Safari. With a faster DNS server, you should notice quicker loading times, especially on sites you haven‘t visited recently.

Step 6: Repair Disk Issues

Occasionally, problems with your Mac‘s startup disk or SSD can cause performance issues across all apps, including Safari. If you‘ve tried the steps above and are still experiencing slowness, it‘s worth checking your disk for errors.

To do this:

1. Open Disk Utility (in Applications > Utilities)
2. Select your startup disk (usually named "Macintosh HD") from the list on the left
3. Click the "First Aid" button at the top
4. Click "Run" and let the repair process complete

If Disk Utility finds and repairs any errors, restart your Mac and see if Safari‘s speed has improved. If you‘re still having issues, or if Disk Utility reports that it can‘t fix certain problems, you may need to consider reformatting your disk or replacing your SSD. Consult with an Apple store or authorized repair shop for further assistance.

Step 7: Use Cleanup Tools

Sometimes, the sheer amount of clutter and junk that accumulates on your Mac can cause system-wide slowdowns, Safari included. Clearing out caches, old downloads, unnecessary applications, and other detritus can have a surprisingly big impact on performance.

While you can do this manually, it‘s far easier to use a reputable third-party cleaning utility like CCleaner or CleanMyMac X. These tools can quickly scan your disk and safely remove gigabytes of cruft in a few clicks. They also include features tailored specifically for browsers, like clearing history/cookies and managing extensions.

For best results, I recommend running a cleanup scan weekly, or whenever you notice your Mac starting to feel sluggish. Pair that with the other tips in this guide, and you‘ll have Safari running like new again in no time.

The Nuclear Option: Reinstall macOS

If you‘ve tried everything else and Safari is still dog slow, there‘s one final option: a clean macOS installation. This will wipe your startup disk and install a fresh copy of the operating system, getting rid of any corrupt files, misbehaving apps, or other stubborn issues that might be slowing things down.

Needless to say, this is not a step to be taken lightly. You‘ll need to back up all of your important data first, and plan on spending some time re-downloading your apps and getting things set up again afterwards. But in rare cases, it might be just what you need to get Safari (and the rest of your Mac) running like new again.

To start the process:

1. Back up your Mac with Time Machine or your backup method of choice
2. Open System Settings > General > Transfer or Reset
3. Click "Erase All Content and Settings" and follow the prompts
4. In the Recovery environment, select "Reinstall macOS" and follow the instructions

Once you‘re back up and running, take care to only migrate back the data and apps you really need, and be judicious about installing new extensions or utilities. Prevention is key when it comes to keeping Safari speedy in the long haul.

Wrapping Up

Safari may be the default browser on Mac, but it‘s not immune to slowdowns. From simple fixes like managing tabs to more advanced solutions like adjusting DNS or reinstalling macOS, there are plenty of ways to get it back up to speed when it starts to lag.

The next time you find yourself growing impatient with Safari‘s spinning beachball of death, come back to this guide and work through it step-by-step. With a little persistence and some basic troubleshooting skills, you‘ll have it running like a champ again – and be able to get back to browsing the web at full throttle.

What are your thoughts on these tips? Did you find a solution that worked for you? Have a better way to fix a pokey Safari? Let me know in the comments below!