Because it is removed from official stores, you must use alternative methods to get the "Install OS X Mavericks.app" file:
System Preferences → Accessibility → Display → Check "Reduce transparency". This drastically speeds up UI rendering on integrated graphics (Intel HD 3000/4000). Mac Os X 10.9 Mavericks Iso
Before downloading and installing Mac OS X 10.9 Mavericks ISO, ensure your Mac meets the minimum system requirements: Because it is removed from official stores, you
file. To use it in a virtual machine (like VirtualBox or VMware), you must convert it to an using Terminal on a Mac: Mount the Installer : If you have the Mac Os X 10.9 Mavericks Iso
: Community-uploaded versions are often found on the Internet Archive .
: hdiutil detach /Volumes/Install\ OS\ X\ Mavericks