Hi Folks,
What I did to solve the "Unable to Install Grub in dev/sda" error.
- Reboot from USB
- Select Try/Install Zorin
- Select Try Zorin OS
- Run Boot Repair from System Tools
Restart normally.
Worked on Zorin 16 Education and Zorin 15.3 Education
This was on an HP ProBook x360 11 G1 EE, Intel Celeron N3350, 4GB RAM, 128GB M.2