The last version to support many older Macs, with improved compatibility with modern web standards.
To check which version of Mavericks you are running, click the Apple menu → . If it is older than 10.9.5, install the combo updater from the Apple Support website while it is still available.
Shut down your Mac. Insert the USB, hold the Option (Alt) ⌈left ceiling key, and turn on the Mac. Select USB: Choose the "Install OS X Mavericks" drive.
If you cannot download it from Apple, web archives and community-driven repositories host the InstallESD.dmg or full OS X 10.9 DMG packages. If you use these sources, always verify the SHA-1 or MD5 checksums of the file against trusted community forums (like MacRumors) to ensure the installer hasn't been modified with malware. 5. How to Create a Bootable USB from a Mavericks DMG
The is a time capsule. It represents the last Mac OS without flat design (Jony Ive’s iOS-ification started in Yosemite). If you need to run old studio equipment, classic games, or simply want to restore a vintage iMac to its former glory, this DMG is your golden ticket.
Many classic Mac games rely on architectures and frameworks that were deprecated in later versions of macOS. Key Features That Defined OS X Mavericks
Mavericks introduced several "under the hood" technologies designed to improve performance and battery life on existing hardware:
Brought Apple Maps and iBooks to the Mac for the first time. System Requirements for OS X 10.9