Some hardware limitations unique to the DTK a thread

• Thunderbolt devices are not supported.
• The DTK supports up to two displays: one on USB-C and one on HDMI 2.0.
• The USB-C port supports a single display up to a 5K using a compatible DisplayPort alt-mode display or adapter.
•The HDMI 2.0 ports supports up to a 4K display.

• Thunderbolt-based displays such as the Apple Thunderbolt Display or LG UltraFine 5K (27MD5KA) are not supported. The LG UltraFine 4K and UltraFine 5K (27MD5KL) support DisplayPort alt-mode and are supported at 4K. The Apple Pro Display XDR is supported at 5K.

• The fans run at a constant speed.
• System does not sleep when USB-C devices are connected.
• The Apple USB SuperDrive is not yet supported on the USB-A ports; connecting it using a USB-C to USB-A adapter is supported.
• Apple Watch unlock is not supported.

• Apple Pay is not supported.
• Audio glitches may occur when unplugging USB devices.
• Force shutdown requires removal of the power cord.

• The coin cell battery in the system will last approximately 6 months, after which the real- time clock will not be preserved on loss of power.
• Installing macOS on another volume on the system or from macOS Recovery is not supported.

• Resetting or erasing a device should be done using a tethered restore with Apple Configurator 2. Wiping the device using the Erase Mac menu option in Recovery OS or using Find My Remote Wipe are not supported.

Going forward to Rosetta 2,
• Applications that depend on a 4K memory page size will not run.
(certain web browser and language runtimes)
• Rosetta uses only the performance cores on the DTK.
• Rosetta will return a CPU ID of VirtualApple instead of GenuineIntel.

• The Rosetta runtime on the DTK only partially enforces the hardened runtime protections.

Software-wise as follows:
• HDCP and 4K HDR playback are not supported; protected video content will fail to play.
• 4K memory pages are not supported.
• Hypervisor.framework is not supported.

• Floating point features like options for flushing denormals and cumulative exception flags will not completely match the behavior of Intel-based Macs.