Release the key when you see the boot menu. Arrow over to Install OS X Mavericks and press Enter.
Users needing to run PowerPC apps via Rosetta (on pre-Lion Macs) or older 32-bit apps that are unsupported on macOS 10.15 Catalina or later [4].
Many professionals rely on older, perpetual-license versions of software—such as Adobe Creative Suite 6 (CS6), older versions of Final Cut Pro, or vintage audio plugins—that simply will not run on newer macOS versions due to the drop of 32-bit app support.
Once completed, you will see a message saying: Copy complete. Done. How to Install OS X 10.9 on Your Mac mavericks os x 10.9.x dmg
The Ultimate Guide to OS X 10.9 Mavericks: How to Find, Create, and Install the DMG
Apple Silicon Macs use a completely different processor architecture (ARM-based) from the Intel processors (x86-64) that Mavericks was designed for. Without Rosetta 2 emulation for entire operating systems (which doesn't exist), direct installation is impossible.
If you're running Windows or Linux, or just want to keep Mavericks isolated from your main OS, virtualization is the answer. Release the key when you see the boot menu
Once you have acquired the Mavericks installer file (usually named Install OS X Mavericks.app inside the DMG), creating a bootable USB drive is the most efficient way to perform a clean installation. Prerequisites:
If you have the "Install OS X Mavericks.app" file inside your Applications folder, Apple built a native Terminal tool called createinstallmedia to make the drive bootable. Open (Applications > Utilities).
When downloading from third-party mirrors, always check the SHA-1 or MD5 checksums of the downloaded installer against known original Apple releases to ensure the file has not been altered or injected with malware. How to Create a Bootable OS X 10.9 Mavericks USB Installer How to Install OS X 10
This is a Python script provided by Apple that can download older macOS versions directly from Apple's servers.
Users could finally organize their files using browser-like tabs within a single Finder window and tag files with custom colors and labels for quick searching. Hardware Compatibility: Can Your Mac Run Mavericks?
Running Mavericks in a VM is an excellent way to test legacy software without affecting your main OS, or to preserve a 10.9 environment for future reference.
This technology groups low-level tasks together, allowing the CPU to enter a low-power state more frequently, improving MacBook battery life significantly.