sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/MyUSBVolume (Replace MyUSBVolume with your USB drive’s name.)
macOS Catalina (10.15) was released in October 2019. As of November 2022, it has reached end-of-life status , meaning it no longer receives security patches or critical updates from Apple. While its successor, macOS Ventura (and later Sonoma/Sequoia), dominate the present, there are legitimate legacy reasons to seek out Catalina: running 32-bit app transitional workflows, supporting specific legacy hardware (2012–2018 Macs), or maintaining compatibility with older audio/visual production suites. descargar macos catalina
softwareupdate --fetch-full-installer --full-installer-version 10.15.7 This downloads the final version (10.15.7) directly from Apple’s servers to your Applications folder. The open-source tool Mist (by Nicolas Roy) can list and download any macOS firmware or installer, including Catalina, from Apple’s own catalog. This is considered safe as it sources directly from Apple. Important Warnings Before Downloading ⚠️ Security Risk Because Apple no longer patches Catalina, using it as a daily driver on an internet-connected machine exposes you to unpatched vulnerabilities. Do not use Catalina for banking, sensitive data, or production environments unless it is air-gapped or strictly isolated. ⚠️ 32-Bit App Apocalypse Catalina is the first macOS to drop 32-bit application support entirely . If you have older games, utilities, or plugins (e.g., many Adobe CS6 components, older Microsoft Office), they will not launch. Verify your critical apps are 64-bit before downloading. ⚠️ APFS Conversion Catalina forces the conversion of your startup drive to the APFS file system (if not already). This is generally fine, but dual-boot setups with older macOS versions (e.g., High Sierra) may experience boot conflicts. Creating a Bootable USB (Recommended for Clean Installs) After downloading the 8.1 GB installer, you can create a bootable installer on a 16+ GB USB drive: sudo /Applications/Install\ macOS\ Catalina