I can't upgrade to El capitan
Hello. I have an imac late 2009. OK its old but I used to run high Sierra. Few days ago I changed hard disk and the service team installed Yosemite. I tried to upgrade to capitan but the installation process can't finish. Says that there is no packet for installation. After that I have to restart again and again without any results. How can I go to Yosemite again?