The latest MacBooks are compatible (Image credit: Apple) 1. Check your device is compatible. Before you download and install macOS Catalina, you'll need to make sure that the Mac or MacBook you're. Complete the process and install macOS Catalina on that computer. Downloading macOS Catalina Install app works fine on my of newly devices but it could be problems for old Macs even it is officially supported by Catalina. If this is the case, then you have to patch the OS and install Catalina again.
Start up from macOS Recovery
Install Macos Catalina On Unsupported Mac
Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:
Apple silicon
Turn on your Mac and continue to press and hold the power button until you see the startup options window. Click the gear icon labeled Options, then click Continue.
Intel processor
Make sure that your Mac has a connection to the internet. Then turn on your Mac and immediately press and hold Command (⌘)-R until you see an Apple logo or other image.
If you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.
Reinstall macOS
Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions.
Follow these guidelines during installation:
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
- Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
After installation is complete, your Mac might restart to a setup assistant. If you're selling, trading in, or giving away your Mac, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
Other macOS installation options
When you install macOS from Recovery, you get the current version of the most recently installed macOS, with some exceptions:
- On an Intel-based Mac: If you use Shift-Option-Command-R during startup, you're offered the macOS that came with your Mac, or the closest version still available. If you use Option-Command-R during startup, in most cases you're offered the latest macOS that is compatible with your Mac. Otherwise you're offered the macOS that came with your Mac, or the closest version still available.
- If the Mac logic board was just replaced, you may be offered only the latest macOS that is compatible with your Mac. If you just erased your entire startup disk, you may be offered only the macOS that came with your Mac, or the closest version still available.
You can also use these methods to install macOS, if the macOS is compatible with your Mac:
- Use the App Store to download and install the latest macOS.
- Use the App Store or a web browser to download and install an earlier macOS.
- Use a USB flash drive or other secondary volume to create a bootable installer.
Mac users with macOS Mojave and macOS Catalina, and new operating systems in place can now install Command Line Tools from the Xcode IDE without needing to install the entire Xcode package, or opening an Apple developers account.
Did you know: Using Xcode app leaves behind a lot of junk files a.k.a. 'development junk.' These files are usually hidden from view but you can delete them with a Mac maintenance app CleanMyMac X.
In this article, we cover how you can install this optional and highly useful Command Line Tools package.
X code 11. Credit: developerinsider
What is the Xcode Command Line Tools package?
For Mac power users — we wouldn't recommend downloading this unless you are comfortable with Terminal — the Xcode Command Line Tools package gives you a complete Unix toolkit accessible through Terminal. No developer account needed and you don't need to download the entire — and quite large Xcode package of executables.
Within the Xcode Command Line toolkit, Mac users gain access to numerous useful tools, utilities, and compilers, including make, GCC, clang, perl, svn, git, size, strip, strings, libtool, cpp, and many others. All of these commands are a default part of Linux systems and programs.
We recommend following these steps for those with the following operating systems running on a Mac: macOS 10.13 High Sierra, macOS 10.14 Mojave, and macOS 10.15 Catalia onward. It isn't always possible to download these Xcode Command Line Tools, following these steps, on Mac’s running older operating systems. Other ways to install command tools and gcc (without needing Xcode) is available through the Apple Developer website.
Here is how you install Xcode Command Line Tools.
How to install Xcode Command Line Tools?
- Go to Terminal in /Applications/Utilities/.
- Input the following command string in Terminal:
xcode-select —install - In the same way when you are downloading new software and apps, a popup update window will appear asking you: “The xcode-select command requires the command line developer tools. Would you like to install the tools now?”
- Select confirm by clicking Install.
- Wait for the Xcode Command Line Tools package to install. It is around 130 MB and usually installs fairly quickly; although it depends on your connection.
- Once everything is installed, the installer goes away and you should be able to any of the new commands that you’ve now got access to. Enjoy using your new Unix command line tools!
Alternative way to install command line tools
If the Terminal combination didn't work, open the Finder > Go to Folder...menu.
Paste in the following path:/System/Library/CoreServices
In that location, find the app called Install Command Line Developer Tools.app — it will have a blue globe icon.
Click this app and then try the Terminal method explained above.
Macos Install Catalina From Usb
With this new download, you should have access to 61 Unix command line tools. For example, one of the advantages of having these tools is you can install new apps and software directly from the source code instead of needing to go through the package manager and usual download route.
Create Macos Catalina Install Usb
To access or view everything you've now got, go to the following directory:
/Library/Developer/CommandLineTools/
Please note, this is the root /Library of your macOS/OS X, not the ~/Library directory.
All of these tools can also be found in: /Library/Developer/CommandLineTools/usr/bin/
These tools like small executable apps (which they are):
What happens if I encounter problems downloading these?
If you get an error message that says “Can’t install the software because it is not currently available from the Software Update server”, it means you've already got the Xcode package on your Mac. Mac OS X 10.9 onward, Xcode was already installed, which is why you aren't able to download these tools. However, what you can do is uninstall the entire Xcode app if you'd prefer to only access these tools and not a whole load of software that isn’t going to be of much use.
Watch out for Xcode junk
The Xcode junk is one of those types of clutter that is keeps accumulating in remote places on your Mac. It could take up a few gigs of your space. The only app that seems to address this problem is CleanMyMac X by MacPaw. It’s loved by many Mac developers because it collects those specific types of development junk, like Xcode or outdated libraries.
Once you launch the app, click on System Junk > Scan. Then, click “Review Details”
CleanMyMac X is a powerful Mac performance improvement app. It makes your Mac as good as new. Let it scan your system and clear out any unwanted Xcode, development and system junk that is taking up too much space and cluttering up your Mac. In a few clicks, your Mac could be running smoother, quicker and more efficiently.