Read Mac OS X - Using Disk Utility to Repair a Disk. If you scroll down a bit, you'll see:

Mac OS X 10.4.x through 10.6.x:
Choose Disk Utility from the Utilities menu at the top of the screen.


You should get that at the second screen, after you select the language. Apparently, you went too far and opted to install the OS.


Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365