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Disable SIP on Macos

October 12, 2025 · 1 min read · Page View:
Tutorial
Macos

System Integrity Protection (SIP) is a security layer that limits even the root user from modifying protected parts of the system. Apple introduced it in OS X El Capitan to reduce the blast radius of malware and accidental system damage. In practice, SIP blocks writes to system locations, prevents runtime injection into protected processes, and restricts some kernel/system-level operations.

Sometimes I run a command and see ‘Operation not permitted’ despite sudo, SIP is often the reason. So I need to disable SIP temporarily.

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Mainland Network Circuits

June 19, 2025 · 3 min read · Page View:
Tutorial
Network

The performance and reliability of internet connectivity to and from mainland China are determined by a complex web of different network circuits, each with its own characteristics.

We will explore the crucial differences between the standard public network backbones, like the workhorse 163 network, and premium, optimized lines like CN2. We’ll also explain what dedicated networks such as IPLC are and why they offer a completely different level of performance and privacy. By the end of this article, you’ll have a clear framework for understanding these circuits, helping you make more informed decisions whether you’re choosing a hosting provider, diagnosing network issues, or are simply curious about how the internet infrastructure in mainland China operates.

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Cloudflare Warp

June 6, 2025 · 7 min read · Page View:
Tutorial
Network | Cloudflare | CDN

Frankly speaking, the first time I heard about Cloudflare is the service so called Cloudflare WARP which is provided by Cloudflare. Nowadays, you must have heard the fastest and private network can be provided by Cloudflare. If I say Cloudflare achieves the fastest object by the first step to visiting any website, the world’s fastest public DNS 1.1.1.1. You can probably guess the private provider, yes, that is Cloudflare WARP. So this article I will introduce the Cloudflare WARP further zero trust and how to use it.

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The principle of Cloudflare SaaS Optimization

June 4, 2025 · 5 min read · Page View:
Tutorial
Cloudflare | DNS | CDN | Network

In common situation, when you use the cloudflare to resolve your domain name, and you choose to use the cloudflare proxy(the yellow cloud icon), then cloudflare would probably get your domain resources into their CDN, that could be a good thing, but as we know, the network in mainland has some special rules, so for the free tier user, the access to the resources in the CDN would be somehow worse, even rest. That means, if the user connect to the node which has high latency, the request will experience worse. So this article will introduce some methods to help your resources access to the cloudflare nodes which are optimized for the mainland.

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How to Keep Your MAC Always Awake

May 30, 2025 · 2 min read · Page View:
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Mac | System | Caffeinate

Here are some common scenarios: You’re about to step away from your Mac for a period, or you’re downloading large files and want to keep your Mac from going to sleep. (If you use an external display, you likely understand what I mean. Sometimes, after waking from sleep mode, your Mac fails to power on the external display.) That’s why I highly recommend Amphetamine to you. I’ve often heard that macOS boasts excellent power management, but lacking in-depth knowledge myself, I’ve sought out the answer.

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