HDMI Dummy Plug 4K High Resolution Virtual Monitor Display Emulator New Generation Headless Display Adapter Compatible with Windows Mac OSX Linux, 3Pack - Walmart.com
HDMI Dummy Plug 4K Display Emulator Compatible with Windows Mac OSX Linux Support 4kx2k 2160P 1080p for Computer Desktop fitHeadless 2 Pack Cable Management - Newegg.com
Amazon.com: UVOOI HDMI Dummy Plug 4K 2-Pack, Dummy HDMI Display Emulator Adapter HDMI Virtual Monitor Supports 3840x2160@60Hz Compatible with Windows, Mac OS, Linux : Electronics