Can't launch AVD on macOS 10.13

Use the new Hypervisor.Framework support instead of HAXM on macOS, as described in the comments of the issue filed for this:

Try running the emulator on Canary channel 26.1.x (API 25/26 recommended) with Hypervisor.Framework; put the text "HVF = on" in ~/.android/advancedFeatures.ini (create this file if it doesn't exist already).

You can download and install the latest version haxm https://github.com/intel/haxm/releases/latest

Following steps worked for me:

1. Uninstall HAXM from android studio SDK manager (Tools->Android->SDK Manager->SDK Tools then uninstall 'Intel x86 Emulator Accelerator (HAXM)' by unchecking it.
2. Download the HAXM version 6.2.1 zip file from Intel site https://software.intel.com/en-us/android/articles/intel-hardware-accelerated-execution-manager-end-user-license-agreement-macosx
3. Install the .dmg file
4. Restart your computer
5. Open your AVD having x86_64 image and it should work.