Couldn\'t use x86 emulators, AVD manager shows warning \"/dev/kvm is not found\" and telling me to edit BIOS security setting to enable VT-x.
Reinstalling and restarting did not work for me. Instead, I had to start my Mac in Recovery Mode (restart & press ⌘+R until Apple logo appears). Then open terminal from Utilities drop down menu. Type and run:
csrutil enable --without kext
You will get some warnings and instruction to restart for the changes to take effect. Restart and the emulator will run this time.
Reference: https://blog.celogeek.com/201708/672/android-studio-emulator-haxm-on-mac-os-high-serria-10-13/