What is a startup disk?
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One of the most recent macOS operating systems for Mac is macOS Catalina. That newly released and announced by the WWDC19. MacOS Catalina is the 10.15 major release of macOS operating system. And macOS Catalina is the sixteenth major release of Apple company which is.
- Please call Catalina Support at 888-826-8766 within 7 days of receiving the PIN Code, we will review the problem that you encountered and work with you to resolve the issue.
- Doing it all, in all-new ways. MacOS Big Sur elevates the most advanced desktop operating system in the world to a new level of power and beauty. Experience Mac to the fullest with a refined new design. Enjoy the biggest Safari update ever. Discover new features for Maps and Messages.
A startup disk, as taken from Apple Support article, is a volume or partition of a drive that contains a usable operating system. Still confused? Let’s break it down for you.
Google top sites homepage. Your Mac hard drive consists of disks (or partitions). Each disk (or partition) has your Mac Catalina OS data on it, which consists of your operating system, applications, etc. Most Mac users have just one disk but power users may have two or more.
Let’s look at an example of a Mac Catalina OS with only one hard disk:
- Your Mac’s hard drive is 500GB.
- It has one “disk” on it, so all 500GB of storage is on that disk.
- The disk has an operating system (OS X El Capitan), and user data (apps, etc).
- And since you only have one disk, this is your startup disk: all 500GB.
A Mac with two disks will have the storage divided between them. The Mac drive with the OS on it is the startup disk while the other drive is just used for storage of files. It’s possible to have multiple startup disks, but most Macs will only have one.
Why your disk is almost full on Catalina OS?
This is easy. It’s a lot like why is your fridge full? There is no more space! Your disk is almost full and this is very bad news for any drive. A hard disk should never get beyond 85% capacity (especially a startup disk) as you will experience slowness and errors the further you get above that mark.
If your startup disk is full and you get a message of warning from your Mac, this is a serious indication that you need to free up storage immediately.
What to do when your disk is almost full?
So how do you fix your almost full startup disk? The same way you solve the problem of a packed fridge – you need to clear up space, of course. To make more space on your startup disk you will need to:
- Delete files from your Mac.
- Move files to an external hard drive or cloud storage.
- Or install a second internal hard drive on your Mac.
So, now that we know what a startup disk is, we need to talk about how to fix it. Let’s take a closer look at your disk space to see exactly what is causing your disk to be almost full.
What’s Causing “Your Disk Is Almost Full” Alert on Catalina OS?
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Short version: Take a look under-the-hood of your Mac.
Before we can see what is taking up space on your startup disk, first we have to find it:
- Hover on the Dock at the bottom of your screen and open Finder.
- Click on “Finder” in the menu bar at the top of your screen.
- Then select “Preferences…”
- In the window that opens, checkmark the “Hard disks” checkbox.
After selecting this box, your desktop should now show the hard disks on your mac, in the form of icon(s), like this:
These are disks on your Mac Catalina OS that you can “startup”, this is because they have operating systems on them. If there is more than one of these hard disk icons that show up on your desktop, it means you’ve got multiple hard disks on your Mac. If you only have one, skip the down to “What is taking up all of my startup disk space?” section.
If you have more than one, continue with the next step:
Click on the Apple icon at the top left of your screen System Preferences > Startup Disk.
Here, again, you’ll find your hard disk(s); they’re probably named something like MainSSD or MainHD. It will also display “OS” and the version number of that OS. If you have more than one OS drive, your startup disk should be the one with the latest version of macOS running on it, but we’re going to make sure of that in the next step.
Here, again, you’ll find your hard disk(s); they’re probably named something like MainSSD or MainHD. It will also display “OS” and the version number of that OS. If you have more than one OS drive, your startup disk should be the one with the latest version of macOS running on it, but we’re going to make sure of that in the next step.
I only have one and it looks like this:
To make 100% sure that you know what drive is your startup disk, follow these steps:
- Click on the Apple Icon in the menu at the top-left of your screen.
- Select “About This Mac.”
- Under macOS, you’ll find a version number. Mine is 10.15.1, like so:
See how my version number in the “About This Mac” window matches the number in my Startup Disk section? Yep — That’s my startup disk. Found yours? Good.
What is taking up all of my startup disk space?
Now that we’ve identified our startup disk, let’s take a closer look at how to clear up space on Mac:
- Click the Apple Icon in the menu at the top-left corner of your screen.
- Choose “About This Mac.”
- Click Storage.
Note: If you are running an older version of OS X Catalina OS you may have to first click “More Info…” and then “Storage”.
Take a look at my hard drive disk:
I’ve got 500GB of storage, and about 275GB of it is free space.
So, how big is your hard disk? How much free space do you have (if any — *gulp*)? And what’s taking up the most space? It is important to consider drive capacity and data storage needs for future storage plans — we’re not just here to fix the problem, for now, we’re going to make sure you never have this problem in the future as well.
Now that we have the knowledge, it’s time to take action and fix your Mac’s “Startup Disk Full” problem.
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macOS Catalina was the newest macOS system until Apple released macOS Big Sur in 2020. Many users prefer to stick with Catalina because it’s good and they are more familiar with it. Still, Catalina has its issues, and one issue that is often mentioned is speed. We know from the system requirements that it’s more demanding of resources than its predecessor, which is why it won’t run on some older Macs that could run Mojave. Happily, there are things you can do to boost performance. Here’s how to speed up Catalina.
macOS Catalina running slow: what do to?
To make macOS Catalina faster, you have to know what’s slowing it down. So do this:
- Go to Applications>Utilities and launch Activity Monitor.
- Click on the CPU column heading to order processes according to how many CPU cycles they are using.
- If you see one that’s using a huge amount more CPU cycles more than anything else, that’s the problem. Use the Quit Process button to quit the process and speed up your Mac, or if it’s a browser tab causing the problem, just close it in the browser.
- If the CPU column doesn’t reveal anything, do the same with the memory column and look to see if any process is using a huge chunk of RAM.
1. Stop applications launching at startup
If the speed problem you’re having is that your Mac takes much longer to startup now that you’ve installed Catalina, it could be because you have lots of applications that are automatically launching at startup. You can prevent them auto-starting like this:
- Click on the Apple menu and choose System Preferences.
- When it has launched, select the Users & Groups pane.
- Select your user account.
- Click the Login Items tab
- Check the box next to any items you want to prevent automatically running at startup.
- Press the ‘-‘ button at the bottom of the window.
- Quit System Preferences.
That’s the long way to get rid of startup items. There is a much quicker way that I prefer to use. CleanMyMac X has a tool that will quickly remove startup programs on Catalina. Here’s how to use it.
- Download and install CleanMyMac X.
- Launch it.
- Choose the Optimization tool in the left hand sidebar.
- Select Login Items
- Check the box next to the ones you want to remove.
- Press Remove.
2. Remove Launch agents
Apple Catalina Version Number
Launch agents are similar to startup items except that they are not full applications, they are additional programs that add functionality to a related application. They launch at startup and could be a reason Catalina i
s slow to boot. Unfortunately, tracking them down manually on your Mac is difficult and time consuming. However, happily, CleanMyMac X can do it for you. Here’s how to remove launch agents.
s slow to boot. Unfortunately, tracking them down manually on your Mac is difficult and time consuming. However, happily, CleanMyMac X can do it for you. Here’s how to remove launch agents.
- Launch CleanMyMac X.
- Choose the Optimization tool, as you did for Login items.
- This time, choose Launch Agents.
- To disable a launch agent, click the green dot to the right of it.
- To remove a launch agent, check the box next to the launch agents you want to remove.
- Press Remove.
3. Close hundreds of tabs
Keeping lots of browser tabs open is convenient, but each one uses resources and they mount up. If, for example, a tab is displaying a page which has lots of animation or auto-running video on it, it will slow your Mac down. So close all the browser tabs you don’t need.
4. Take control of your Spotlight
If you have Spotlight set to its default, it will index every folder on your Mac, including those on external drives that are mounted. And indexing can slow down your Mac. You probably don’t need to search the contents of, say, your Downloads folder, or Library directory. Here’s how to exclude folders from Spotlight indexing.
- Go to the Apple menu and choose System Preferences.
- Select the Spotlight pane.
- Choose the Privacy tab.
- Press the ‘+’ to add folders to be excluded and then navigate to them, or just drag folders onto the window to exclude them.
- Quit System Preferences.
5. Update applications
macOS Catalina performance may get worse if applications on your Mac are out of date. Developers update applications regularly for all sorts of reasons. Most updates include bug fixes and performance improvements, so it’s important to keep them up to date. For apps that you download from the App Store, it’s easy. Just launch the App Store, go to Preferences and select Automatic Updates and your apps will always be up to date. For other apps, you’ll have to launch each one and check for updates from the application menu. Happily, there is a way you can update all your apps in one go using CleanMyMac X. Can you see how useful it is?
- Launch CleanMyMac X.
- Select the Updater tool in the Applications section.
- Press Select All.
- Press Update.
6. Shut down your Mac regularly
Modern Macs, especially MacBooks, MacBook Airs, and MacBook Pros are designed to be able to run and run without being restarted, thanks to their low power sleep mode. However, shutting down you Mac does more than just conserve energy. Make google default browser on safari. It clears temporary files, like swap files that are used as virtual memory, and it frees up RAM. Restarting your Mac regularly will keep it running quickly and smoothly.
7. Add more RAM
Sometimes, the only solution to fix macOS Catalina speed is to update your hardware. Adding more RAM will almost always make your Mac faster, whether it’s running Catalina or an older OS. If your Mac has RAM slots available and you can afford it, adding more RAM is a very worthwhile investment.
There are many tools that claim to speed up your Mac. Don’t believe apps that tell you that “your Mac is hijacked by virus” — this is a well-known scam. On the other hand, there are apps that help you better manage memory on Mac. For example, the app we’ve told you about, CleanMyMac X, has a tool called Speed that disables heavy-memory consumers. And this program is actually notarized by Apple.
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- Give it a go in a free version — no obligations:-)
- Install the app and click Optimization
- After running optimization tools, click the Maintenance tab
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If macOS Catalina is very slow, there are lots of ways you can speed it up. Follow the steps above and it should be running smoothly in no time.
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