diskled.com

What It Is

DiskLED is a menu bar disk activity monitor for macOS. It uses colored LED indicators to show real-time disk reads and writes: green for reads, red for writes, and a blended display when both occur at the same time. Compared with opening the system Activity Monitor, it is better suited to living in the menu bar, making it easy to quickly see whether a hard drive, SSD, or external drive is busy.

Core Features and Use Cases

In terms of functionality, DiskLED is more than just a “blinking light.” It lets you adjust the LED size, spacing, and sensitivity, and uses adaptive polling that can ramp up to 15Hz during disk activity and drop to 1Hz when idle to reduce CPU usage. Its speed test feature can run sequential read/write tests across all connected drives, and it claims to use direct I/O to bypass the file cache for better accuracy. The I/O stress test can launch random-sized reads and writes simultaneously, with configurable duration, minimum/maximum I/O size, and per-disk statistics. The paid version also supports separate LEDs for each physical drive, custom read/write colors per drive, and safely ejecting external drives from the menu bar.

Pricing and Value

The product uses a freemium model. The free version costs $0 and already includes a combined LED, custom read/write colors, disk speed testing, I/O stress testing, and sensitivity and size controls. The Individual Drive LEDs upgrade is a one-time $2.99 purchase, unlocking separate LEDs for each physical drive, per-drive colors, LED spacing control, and menu bar ejection. By desktop utility standards, the pricing is simple, the barrier to entry is low, and the overall value is strong.

Pros and Cons

The strengths are its clear positioning and lightweight interface, making it suitable for everyday I/O monitoring by users with external SSDs, portable hard drives, or multiple disks. Its speed test examples also suggest it can help identify performance bottlenecks caused by cables or interfaces. The drawbacks are that the available text only indicates macOS support, with no Windows/Linux versions mentioned. There is also no information about APIs, SDKs, CLI support, or team monitoring integrations, so it is not a replacement for professional operations monitoring. On the documentation side, only Help and Privacy entries are visible, so the level of detail is unclear.

Who It’s For and Access from China

DiskLED is suitable for macOS developers, video/design professionals, NAS or external drive users, and anyone who needs to quickly troubleshoot abnormal storage speeds. The text does not specify access or payment conditions in China. Since it is downloaded through the Mac App Store, actual availability depends on local App Store access and account payment conditions. Alternative tools include iStat Menus, the built-in Activity Monitor, DriveDx, Blackmagic Disk Speed Test, and others.