You are running an old OS, so not everything is perfect. Here are the bugs specific to this combination and how to solve them.
The "new" engine finally supports OpenType variable fonts. On El Capitan, where Apple’s own Font Book is stagnant, CorelDRAW now allows you to manipulate weight, width, and slant of a single font file in real-time without installing 50 separate files. coreldraw for mac os 1011 new
For users running legacy hardware on El Capitan, achieving a "new" CorelDRAW experience requires specific workarounds or the use of much older versions. Historically, CorelDRAW had a long absence from the Mac. You are running an old OS, so not everything is perfect