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Apple ACE3 Controllers: Difference between revisions

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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.
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 A3113 ==
== Testing on a working A3113 ==
Types of controllers encountered so far: SN25A23P.
Types of controllers encountered so far: SN25A23P.


=== Test 1 : Swapping UF400 and UF500 ===
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
Test date: 2025.09.26
Description: Just swapping the two controllers, from that board.


OS: Sonoma.
OS: Sonoma.
Line 19: Line 23:
DFU Restore (Tahoe) : Ok.
DFU Restore (Tahoe) : Ok.


Display output: Ok, both ports.
Display output: Ok, both receptacles.


Charging: Ok.
Charging: Ok (both receptacles + Magsafe).


Data (Thunderbolt): Ok.
Data (Thunderbolt): Ok (both receptacles).


Conclusion: Nothing abnormal, it looks like both are interchangeable.
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".

Revision as of 12:39, 26 September 2025

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".