Almost on all CPUs used in Macs Virtualization is supported, but in several
How to check that Intel VT-x is supported in CPU:
Open Terminal application ( Application > Utilities > Terminal)
sysctl -a | grep machdep.cpu.features
You may see output similar to the one
If you see VMX entry then CPU supports Intel VT-x feature, but it still may be disabled.
Please run Software Update from Apple to resolve this issue.
articlestates, VT-x can be disabled due to an outdated firmware what's why we suggest running Software Update as firmwareupdate is a part of it.