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Although the new macOS 12 Monterey is a smaller update compared to Big Sur, it’s still packed with lots of amazing features. Upgraded FaceTime, Universal Control across devices with single mouse or trackpad, improved Safari browsing experience, privacy enhancements, the list go on.
We are all excited about the new macOS and hit the update button, only to find our Mac experiencing performance issues such as the machine runs slow after updating to macOS Monterey. Common symptoms include:
- Apps are slow to open or keeps freezing.
- The fan is constantly running and has high noise.
- Internet becomes super slow and it’s impossible to watch YouTube videos.
If you are facing one of those macOS Monterey slow issues with your Mac (iMac, MacBook Pro, MacBook Air), read on to find out how to fix it. We are going to share with you some of the best tips and tricks. Let’s get started.
Note: there are many possible reasons behind a slow Mac, we’ll start with the basic fixes. If one particular fix doesn’t work, try another one.
- 1. Check Whether Your Mac is Compatible with Monterey
- 2. Disable Startup Items (Apps & Hidden Launch Agents)
- 3. Find and Quit Resource-hungry Apps via Activity Monitor
- 4. Clean up System Junk and App Junk
- 5. Enable Optimize Storage with Your Mac
- 6. Reset SMC and NVRAM
- 7. Clean Install (Re-install) macOS Monterey
1. Check Whether Your Mac is Compatible with Monterey
Technically speaking, this is not a fix but it’s worth checking as the first step. Every new macOS that Apple has released has a minimum requirement on hardware. If your Mac machine is showing its age, it’s going to have a difficult time running the latest operating system, or even not compatible with the latest version at all.
Click here to learn the list of macOS Monterey supported Macs and check whether your Mac is on the list or not. Also, the installer file of macOS Monterey is 12GB, but you’ll need at least 35GB of free storage on your Mac for the new system to run, preferably 50GB or even more.
If you find that your Mac is too old to run macOS Monterey, it’s probably a good idea to revert to an older version since you’ll encounter more performance issues after updating and there aren’t many tricks you can play around with to speed up your machine.
Best for: When your Mac is slow to start up.
Take a look at what startup apps or auto launch agents you have running and stop as many of these from opening as possible. The fewer programs that run automatically on startup, the faster your Mac will be. To disable these startup items:
- Click on the Apple menu from the top left corner.
- Click on System Preferences (System Settings on macOS Ventura and above) > Users & Groups > Login Items
- Select these apps that you don’t need to auto startup and hit the minus “–” option.
Meanwhile, there might be some launch agents (i.e. hidden apps/services that keep running in the background) that slow down your Mac’s startup speed as well. And they are not that easy to be spotted out unless you use a tool such as CleanMyMac X.
Here’s how to remove them:
- Run CleanMyMac on your computer.
- Click on Optimization > View All Items > Launch Agents.
- You’ll see a list of small helper and service applications that automatically run after your Mac boots up. Select those you don’t want and hit the Remove button.
Then you’ll be all set. You should notice some speed gain when you reboot your Mac machine.
3. Find and Quit Resource-hungry Apps via Activity Monitor
Best for: When your Mac is slow when running specific applications.
Another reason for macOS Monterey running slow is that those resource-hungry applications are taking away too many system resources while running. Big programs like Photoshop, Camtasia, and Final Cut Pro tend to use much more power than smaller ones. It’s usually fine when these programs are working with a big photo or rendering a video effect, but if they are constantly taking more share than they should, something is probably wrong.
To find out which applications/services are over-consuming your system power, follow the steps below:
- Open Finder > Applications > Utilities.
- Locate this app called Activity Monitor and double click to open it.
- Look at the processes from the top of the list, see if there are any processes that are using much power, e.g. taking more than 50% CPU.
- If you spot any processes that seem to be resource-hungry, try quitting them by simply selecting and clicking on the “x” button from the toolbar on the top, and see what happens.
Sometimes this might be all that you need to do and your Mac will run smoothly again.
Note: for those big photo/video editing applications that you often use, it’s also a good idea to check whether they have a newer version. If yes, you’d better update the apps to the latest version for optimal performance.
4. Clean up System Junk and App Junk
Best for: When macOS Monterey runs slow for no obvious reason.
Another quick method you can use to speed up your MacBook or iMac after updating to Monterey is by cleaning out system junk and app junk. Each time you update your Mac, there are some files written on the computer but you don’t need once a new macOS finishes installing but they might still be stored somewhere on your Mac. Same with third-party apps. Often times by cleaning those unnecessary files, your Mac with Monterey will run faster.
However, it’s not that easy to identify these junk files than it might sound, unless you are a computer person. For most of us (i.e. general Mac users), the best way is to use a third-party tool. Again, we like CleanMyMac and recommend it for this job because it’s easy and simple to use. Both a free version and a paid version are available. The free version will do an OK job of cleaning system junk and app junk but the paid version will actually prevent junk files from building up in the first place, which makes it worth considering.
How to clean it?
- Open the CleanMyMac app and click on the System Junk from the left panel.
- Click the yellow “Grant Access” button to allow the app to find more junk.
- Hit the Scan button to get started.
- Soon you’ll see a list of junk files that are safe for removal.
- Don’t forget to navigate to Photo Junk, iTunes Junk to clean app junk.
5. Enable Optimize Storage with Your Mac
Best for: When your Mac is running out of storage after updating to macOS Monterey.
In general, the more storage space you have for your Mac machine, the faster it will run. The question is how to quickly free up some storage? Optimize Storage is a cool feature that you can take advantage of. It saves space by automatically removing your watched movies and TV shows from this Mac.
- Click on the Apple logo.
- From the drop-down menu, select About This Mac > Storage > Manage.
- You’ll see a window like below, click on the “Optimize” button for Optimize Storage.
- Wait until it’s completed.
6. Reset SMC and NVRAM
Best for: When your Mac fan or sound is running loud, battery and power drain fast, etc.
According to Apple, resetting the system management controller (SMC) can resolve certain issues related to fans, battery, power, and some other features. Similarly resetting NVRAM on your Mac can help address issues related to display resolution, sound volume, startup-disk selection, and recent kernel panic information. If you feel your Mac is acting after updating to the latest macOS Monterey, it’s probably a good time to reset SMC and NVRAM.
Resetting SMC and NVRAM are harmless operations and they are easy to be done. You can follow the guides linked above from Apple, or watch this YouTube video for step-by-step instructions.
7. Clean Install (Re-install) macOS Monterey
Best for: When you’ve tried all the above techniques and your Mac is still slow.
macOS Monterey is a great operating system, but it’s not perfect. That’s why Apple has been fine-tuning it since it was first released in June 2021 at the WWDC. If you’ve tried all the fixes above and your Mac still lags, then re-installing might be your last resort.
A clean install will erase all the data on your Mac hard drive so you have no customization, no third-party apps, no user data, etc. just like you are having a new computer that should be quite fast. Check out this article for more information.
Important: make sure to back up your Mac before you start the clean install.
Why iMac or MacBook Pro Can Run Slowly after Updating to macOS Monterey
There can be quite a few causes. The first one is if your computer is not actually compatible with the latest macOS. Apple has made a list of devices supported by Monterey, they are:
- MacBook: 2016 or newer.
- MacBook Air: 2015 or newer.
- MacBook Pro: 2015 or newer.
- iMac: Late 2015 or newer.
- iMac Pro.
- Mac Mini: 2014 or newer.
- Mac Pro: 2013 or newer.
As you can see, MacBooks needs to be a model made in 2015 or later to even run macOS Monterey. If you are using a model made in 2014 or before, you are not going to be able to run the new macOS, unfortunately. Even if your Mac is compatible but it’s showing its age, there isn’t much you can do to speed it up either. Your best option is not to upgrade at all.
Other reasons can be categorized into two types. One is hardware-related, and the other is software. If your Mac is running with a spinning hard drive other than flash storage (SSD), it’s going to be slow in general because SSDs (solid-state drives) are much faster than HDDs (hard disk drives). Software could be the culprit as well as outlined above, and we’ve shown you the best solutions accordingly.
The newest Apple operating system, macOS Monterey, is definitely powerful, beautiful, and exciting to install for Mac users. But sometimes when new software is released, even by tech giants like Apple, there are glitches that can cause frustration. One such glitch is that it can cause some Macs to slow down after updating. There are some fixes for speeding up macOS Monterey as we introduced above.
So, back to you now, did your MacBook Pro or iMac run slower after updating to the latest macOS? And did you manage to fix it? Leave a comment below and we’ll try our best to help you out.About Eric