Yosemite is optimized for mid-2007 to 2015 Mac models, breathing new life into vintage hardware. System Requirements for OS X Yosemite 10.10.5
Troubleshooting: "This copy of the Install OS X Yosemite application cannot be verified"
If you'd like to proceed with setting up your classic Mac system, let me know: What of Mac are you using? mac os x yosemite 1010 5 download dmg link
Once the InstallMacOSX.dmg file finishes downloading, you cannot simply run it on a modern Mac to upgrade. You must first extract the actual installer package.
Go to your Applications folder and run . 4. Optional: Create a Bootable USB Yosemite is optimized for mid-2007 to 2015 Mac
You can download the genuine OS X Yosemite installer directly from Apple's support servers using a web browser.
Terminal will erase the drive and copy the Yosemite setup files. Wait until it says "Done" or "Copy complete." How to Clean Install OS X Yosemite Using the USB You must first extract the actual installer package
Type your Mac's administrator password when prompted (the cursor will not move) and press Enter.
Before you download and install Mac OS X Yosemite 10.10.5, make sure your Mac meets the following system requirements: