Thunderbolt no signal

Hallo dear community,

i have a problem with my thunderbolt connection, cause a have no videosignal at my ext. monitor.
I have installed zorin ultimate in the newest version on a older macbook- not pro;
And under settings/devices/thunderbolt it says, that thunderboldt may not be enabled in bios.

Does anyone an idea?

Thx and have a nice evening.

Does this help?