So, your Mac is taking forever (or much longer) to startup? Studies show that when a slow startup is not only a waste of time, it also affects your health.
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There is nothing more frustrating than a slow MacBook Pro or iMac when you need it to get the work done in the morning. Usually, a Mac takes 30 seconds (or less) to start up, depending on whether your computer has a hard disk drive (HDD) or solid-state drive (SSD).
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But if it takes much longer (or forever) to reach the first screen, then something is wrong.
We’ve found seven possible causes accountable for the issue, together with important tweaks to help you fix it.
Hopefully, by doing so, you can speed up the boot a little bit, and spend the time getting more work done.
Note: some of the tips below are from the research we did from the Internet (especially Apple communities/forums), we also have experience consulting geeks on the Apple Genius Bar.
Nothing slows down a Mac more than having loads of apps and services launching when you press the start button. If you can reduce the number of auto-startup items, you’ll be sure to wait less time, and your Mac will perform better too.
How to fix: remove unnecessary login items
Login items are those applications that run automatically once you log in. To check and disable those unnecessary items, click Apple icon > System Preferences > Users & Groups, now click on the Login Items tab (it’s right next to Password). Then select those items you don’t need to open up on startup, and click the minus “-” symbol.
That’s it. Easy, ugh?
Meanwhile, don’t forget those launch agents (aka, app services that autorun and show up on Mac Menu Bar). For example, AmazonMusic, Adobe CreativeCloud Helper, etc. When you install an Amazon or Adobe app, its helper services are often pre-installed too. The worst part? They don’t show up under Login Items.
How to find and remove them? One of the best ways is via CleanMyMac. ​The app has a feature that allows you to quickly identify those launch agents and disable them.
Lack of storage is one of the main culprits for many computer performance issues, including slow startup. When your startup disk is almost full, the entire machine will run slowly. It is a best practice that we keep the free disk space at 20% level (minimum).
If you can lighten the Mac drive and delete those unnecessary files, for example, system junk, duplicate files, unused third-party apps, etc., that will help optimize your Mac startup.
How to fix: clean up Mac drive
There are many manual fixes regarding this, at the price of taking your time thought. Some may require technical skills during the process.
For instance, you can uninstall Mac apps that get barely used, remove duplicates and similar files, transfer large old data (especially movies and photos) to an external backup drive, clean web browser junks, and empty Trash, etc.
If you are new to Mac, we also recommend using CleanMyMac for efficiency. It’s an intelligent app primarily designed to clean up Mac disk the quick way so you save time doing so manually. You’ll be amazed by the number of unnecessary files it finds.
Be honest, how many peripherals you have on your Mac now? If you use your iMac or MacBook as a hub for everything, chances are it’s now surrounded by a number of peripherals like USB-C hub, printer, scanner, portable SSD drive, iPhone charger, etc.
These third-party items are prone to drag down your computer performance, particularly when they are not working correctly due to software issues.
How to fix: disconnect unused peripherals
So, it’s best to connect the device only when you need it. Also, don’t forget to check relevant settings and software related to the device you use, all to make sure they are correctly set up and up-to-date.
NVRAM, short for “Non-volatile Random Access Memory”, stores many pieces of information a Mac needs before it loads Apple’s macOS operating system. If the values in this memory get out of order for some reason, your Mac won’t start up correctly — one of the typical symptoms is your Mac takes forever to start up.
Note: old Mac machines use PRAM, which is similar to NVRAM.
How to fix: reset NVRAM
Here’s how to do it. First, shut down your Mac, press the start key (or button). Then quickly hold these combination keys: Command + Option + P + R, right after you hear the startup sound. Then release the keys when you hear the sound for the second time.
That’s it! You can also watch this video for how:
Tip: the video uses a MacBook Pro as an example. If you’re on an iMac or Mac Mini/Pro, the process is the same.
Sometimes errors can hit Macintosh HD (or SSD), especially when your Mac shows its age (before 2012 models). If that applies to you, your Mac’s hard drive may act up, and the overall system performance is taxed. In this case, it’s no surprise that the startup time will be affected.
How to fix: verify and repair disk using Disk Utility
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Go to Finder > Applications > Disk Utility.
It is in my experience that when I perform a macOS upgrade, my Mac machine boots up a bit slower though it’s not always the case. For example, it was super quiet when I updated from High Sierra to Mojave. However, my machine was excellent while upgrading from macOS 10.13.1 to 10.13.4. So, I guess a major macOS update will slow down boot time.
How to fix: Restart several times
Unfortunately, it seems we don’t have any working solutions here except restarting your Mac. Because a slow startup is normal and expected after the installation of a new macOS version. Subsequent restarts will help bring your Mac to average speed.​
Every technology has its lifespan, and eventually, it will fail. Hard drives are no exception. If your Mac is not only slow on startup but sluggish on almost everything. More often than not, it’s time to check Mac drive health to get a sense of the chances of drive corruption and gauge how long the disk will stand.
How to fix: upgrade to an SSD
Replacing the spinning HDD with a new SSD (like Samsung 860 Pro) is perhaps the best way to speed up an old Mac, and significantly improve the startup time. There are many other benefits using an SSD versus an HDD, we won’t elaborate here as you can read more from this SSD upgrade article we put together.
Alright, these are the seven possible reasons and fixes for troubleshooting the Mac slow startup issue. Hopefully, you’ve tried some of them, and have tuned up your Mac.
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Chris is a lifelong tech enthusiast with a broad range of interests including coding, data analysis, traveling, and more. He used to work as a software programmer immersing himself in the world of codes, now he finds it more interesting talking to real people.