Once the download is complete, the installer will open automatically. 4. Installing macOS Catalina In the installer window, click . Follow the on-screen instructions. Agree to the software license agreement.
Your Mac will restart, show a black screen with an Apple logo and progress bar, then restart again. This is normal.
Note: If your Mac is not on this list, you cannot upgrade natively. You will have to look into unofficial community alternatives like the dosdude1 macOS Catalina Patcher. Step 2: Prepare Your Storage and System how to update macos high sierra 10.13.6 to 10.15
To check your model, click the in the top-left corner of your screen and select About This Mac . Compare your model against the official compatibility list below: MacBook: Early 2015 or newer MacBook Air: Mid 2012 or newer MacBook Pro: Mid 2012 or newer Mac mini: Late 2012 or newer iMac: Late 2012 or newer iMac Pro: 2017 or newer Mac Pro: Late 2013 or newer Step 2: Check Your Storage and Power
You need a minimum of 15 GB to 20 GB of available storage on your internal drive. If you are running low, clear out your Downloads folder, delete old device backups, or move large media files to an external drive. Once the download is complete, the installer will
Find 64-bit replacements before upgrading, or accept that you’ll lose access to those apps. If you rely on any legacy 32-bit apps, do not upgrade to Catalina – stay on High Sierra or Mojave.
To check your model, click the in the corner of your screen and select About This Mac . 2. Crucial Preparation Steps Follow the on-screen instructions
Your Mac may open the Software Update pane in System Preferences to begin the download. Confirm that you want to download the software. 2. Run the Installer
Locate your critical applications. If any are 32-bit, source their 64-bit upgrades or find modern alternatives before proceeding.
Double-click Install macOS Catalina.app in your Applications folder. Click “Continue” and agree to the software license.
Do not skip this step. If the upgrade is interrupted by a power failure or a system crash, you risk losing all your data. Connect an external hard drive, open Time Machine from your System Preferences, and click Back Up Now . Step 4: Download and Install macOS Catalina 10.15