RDM is a lightweight, free tool that lets you quickly change resolutions, including HiDPI resolutions, from a menu bar icon. It is less feature‑rich than SwitchResX but works well for basic use cases.
The cost is currently around $17 per license, providing you with a lifetime license for the version you purchase. Switchresx Serial Number
: If you share these technical reports on public forums for troubleshooting, be aware that the EDID binary and decoded output usually contain your monitor's serial number. You may wish to censor this information before posting. 4. Troubleshooting and Support RDM is a lightweight, free tool that lets