When considering compatibility between Thunderbolt 4 docks and the M4 MacBook Pro, there are a few key points to note:
1. Thunderbolt Compatibility: Thunderbolt 4 docks are generally compatible with M4 MacBook Pros, as these docks are backward compatible with Thunderbolt 3 and USB-C. However, the M4 Pro and Max models feature Thunderbolt 5 ports, which are also backward compatible with Thunderbolt 4, USB4, and USB-C[1][5].
2. Display Support: The base M4 MacBook Pro supports up to two extended 4K displays at 60Hz or one 8K display at 60Hz over Thunderbolt 4[1][10]. The M4 Pro and Max models support dual 6K displays at 60Hz[12]. Some docks, like the CalDigit Thunderbolt 4 Pro Dock, support up to dual 6K displays at 60Hz or a single 8K display[3]. However, macOS does not support Multi Stream Transport (MST) technology, which can limit display configurations in some setups[6][11].
3. Power Delivery: Thunderbolt 4 docks typically offer power delivery, but the amount can vary. For example, the CalDigit Thunderbolt 4 Pro Dock provides up to 98W, while the Belkin Pro Thunderbolt 4 Dock offers up to 90W[3][9]. The M4 MacBook Pro models can benefit from docks with higher power delivery, especially for resource-intensive tasks.
4. Manufacturer Support: Some manufacturers, like CalDigit, provide detailed compatibility charts for their docks across various Mac models, ensuring that users can anticipate the capabilities of their setup[2]. Anker, on the other hand, may not officially support non-Pro processors, despite potential compatibility[2].
5. Future-Proofing: Thunderbolt 5 support in the M4 Pro and Max models future-proofs these devices, as Thunderbolt 5 is backward compatible with earlier standards. This means that using a Thunderbolt 4 dock now will still be compatible with future upgrades[1][12].
In summary, while Thunderbolt 4 docks are generally compatible with the M4 MacBook Pro, users should ensure that the dock supports their specific display and power needs. Additionally, macOS limitations regarding MST technology might affect display configurations in some setups.
Citations:[1] https://plugable.com/blogs/news/the-best-docking-station-for-m4-macbooks
[2] https://forums.macrumors.com/threads/review-ankers-778-thunderbolt-4-docking-station-offers-an-array-of-usb-and-display-connectivity-options.2397080/page-2
[3] https://www.apple.com/shop/product/HRJK2ZM/A/caldigit-thunderbolt-4-pro-dock
[4] https://apple.stackexchange.com/questions/398384/2015-mbp-thunderbolt-2-output-to-thunderbolt-3-dock
[5] https://www.macworld.com/article/668894/best-thunderbolt-3-4-and-usb-c-docking-stations-for-macbook-pro-and-air.html
[6] https://www.reddit.com/r/UsbCHardware/comments/1ebxoia/belkin_thunderbolt_4_dock_and_macos_a_combination/
[7] https://www.brydge.com/prodock
[8] https://eshop.macsales.com/blog/72169-everything-about-thunderbolt-4-cables/
[9] https://www.belkin.com/p/pro-thunderbolt-4-dock/INC006ttSGY.html
[10] https://plugable.com/blogs/news/plugable-products-tested-and-approved-for-the-apple-m4-macbook-pro
[11] https://discussions.apple.com/thread/255855587
[12] https://www.kensington.com/news/docking-connectivity-blog/thunderbolt-5-for-macbook-m4-pro-and-m4-max/