We all know that desktop KVM is generally an unreliable technology, but it's more reliable than most. I have a 2017 Macbook Pro, a Windows 10 desktop, a 27" Dell 4k monitor and various peripherals. In general, I can successfully switch back and forth. Macbooks sometimes have trouble feeding video to a Dell monitor, but I think it's a displayport issue in recent versions of OSX and I was able to get it working mainly by updating the displayport driver (if you're having trouble with the laptop trying this). Switch to dual displays but the display stays idle, google "os x displayport driver update". I bought this to replace another Siig KVM that I found mostly unusable. Maybe it's just a comparison, but I'm very happy with it.
π TRENDnet TK-803R: 8-Port Rack Mount KVM Switch with VGA & USB Connection, USB/PS2 Support, Device Monitoring, Auto Scan - Control 8 Computers/Servers
10 Review
4 Port USB 3.0 Switch Selector - Pubioh KVM Switch for Mouse, Keyboard, Printer, Scanner - 2 in 4 Out Sharing Box with Switch Button and 2 USB 3.0 A to A Cables
11 Review
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review
CKL 4 Port KVM Switch Dual Monitor DisplayPort 4K 60Hz: Unprecedented Multi-Computer Control with Audio, USB 2.0 HUBS, and DP 1.2
11 Review
MasterBox Q300L Micro-ATX Tower with Magnetic Dust Filter, Acrylic Side Panel, Adjustable I/O & Ventilated Airflow, in Black
40 Review
Computer case AeroCool Cylon black
39 Review
Fractal Design Node 304 - Black - Mini Cube Compact Computer Case - Small Form Factor - Mini ITX β mITX - Enhanced Airflow - Modular Interior - Includes 3x Fractal Design Silent R2 120mm Fans - USB 3.0
42 Review
Zalman Z3 M ATX π» Tower Computer: A Compact and Powerful Machine
77 Review