Download ISO https://www.oracle.com/solaris/solaris11/downloads/solaris-downloads.html
Upload to Proxmox local ISO images
Create VM Choose downloaded ISO Guest OS: Linux 5.x
Grahics: Default
Chipset: i440fx
Bios: OVMF
SCSI: Virtio
Disk: 32G, Virtio Block
CPU Type: host
Memory: 5G minimum to install, 4G after install
Network model: VirtIO
Options
- Enable Guest Agent, advanced type isa-serial
Remove EFI disk before startup.