More actions
| Apple ACE3 Controllers | |
|---|---|
| Manufacturer | Apple |
| Code name | ACE3 |
| Release date | 2023 |
| Device type | Laptop |
This is a placeholder to document testing done with ACE3 controllers on Macbooks, and add knowledge tidbits as they trickle down. Once we understand these controllers, the page will be reorganized as a proper explanation on the ACE3.
Testing on a working A3113
Types of controllers encountered so far: SN25A23P.
ACE configuration: Controllers for receptacles are in Master - Slave configuration, Magsafe controller is Master.
Test 1: Swapping UF400 and UF500
Test date: 2025.09.26
Description: Just swapping the two controllers, from that board.
OS: Sonoma.
The device seems to work right away, and normally.
DFU Restore (Tahoe) : Ok.
Display output: Ok, both receptacles.
Charging: Ok (both receptacles + Magsafe).
Data (Thunderbolt): Ok (both receptacles).
Conclusion: Nothing abnormal, it looks like both are interchangeable.
Test 2: Replacing UF400
Test date: 2025.09.26
Description: Replacing UF400 by an SN25A23P bought new (Mobilesentrix).
OS: Tahoe.
DFU Restore (Tahoe):
Display output: Ok, both receptacles.
Charging: Ok (both receptacles + Magsafe).
Data (Thunderbolt): Ok (both receptacles).
Conclusion: Nothing abnormal, it looks like UF400 can be replaced by an SN25A23P advertised as "new".