A guide to force enabling Xcode LLM feature on China-SKU Macs.

ForceEnablingXcodeLLM.md

Introduction

Apple restricted the access to Xcode LLM (Predictive code completion) feature on China models of Mac. This guide provides a way to bypass that restriction. It's verified on macOS 15.0 Beta (24A5264n), but there is no guarentee that it will always work on later macOS versions.

Prerequisites

• Xcode is installed and run at least once.
• SIP debugging restrictions are disabled (via csrutil enable --without debug command in recovery mode).

Disclaimer

Disabling SIP can cause some unknown effect. And for now, Xcode LLM is not stable and may cause kernel panics, which will lose some of your document modifications. Please use with caution.

Bypass Steps

1. Attach to eligibilityd using LLDB

$ sudo lldb

Then execute the below command in LLDB console:

(lldb) process attach --name eligibilityd

It should stop the main thread of eligibilityd process and show a (lldb) prompt if successful.

2. Modify the device region

(lldb) e (void) [[[InputManager sharedInstance] objectForInputValue:6] setValue:@"US" forKey:@"_deviceRegionCode"]

3. Recompute the domain answers

(lldb) e (void) [[EligibilityEngine sharedInstance] recomputeAllDomainAnswers]

4. Verify the domain answer (Optional)

You can check whether the operation is effective by executing:

(lldb) po [[[[EligibilityEngine sharedInstance] domains] objectForKey:@"OS_ELIGIBILITY_DOMAIN_XCODE_LLM"] answer]

If it prints 0x0000000000000004 then it's all good.

5. Detach the process and exit LLDB

(lldb) process detach
(lldb) exit

6. Restart Xcode and enjoy!

Acknowledgement

Thanks for those who make this possible together: Lakr233, Sou1gh0st, Yuriko.

omg mymac show this error:attach failed: debugserver is x86_64 binary running in translation, attach failed.

me too， How to solve this situation

arch -arm64 sudo lldb

好奇问一嘴，禁用 SIP 后，修改系统文件，然后重新开启 SIP 会恢复 device region 吗。如果不会的话，修改完重新开启 SIP 系统是不是就可以在安全的方式下使用 Swift Assist 了。
Just curious, after disabling SIP, modifying system files, and then re-enabling SIP, will it restore the device region? If not, after modifying and re-enabling SIP, can the system be used securely with Swift Assist?

好奇问一嘴，禁用 SIP 后，修改系统文件，然后重新开启 SIP 会恢复 device region 吗。如果不会的话，修改完重新开启 SIP 系统是不是就可以在安全的方式下使用 Swift Assist 了。 Just curious, after disabling SIP, modifying system files, and then re-enabling SIP, will it restore the device region? If not, after modifying and re-enabling SIP, can the system be used securely with Swift Assist?

我前面试了 不行 又变成灰的了。
I've tried to turn SIP back on, but the option grayed out.

重启电脑就失效了，能否实现自动执行命令？
The command will fail if I restart the computer. Is it possible to execute the command automatically?