iMessages on High Sierra running in Ubuntu 18 on 2011 iMac

[HuntingdonDuke]

I have a High Sierra virtual machine running on Ubuntu 18.04 on a mid-2011 iMac (attached pdf shows specs to confirm). I cannot get iMessages to work, though I can open iTunes and download podcasts, and I can get on the internet. Any suggestions as to how to get this to work? Thanks