Install urlwatch on a Mac with Homebrew, define the pages or commands you want to monitor, test a run, and schedule it with cron. The interval between cron runs determines how often urlwatch checks for changes; the project recommends running no more often than every 30 minutes.
Install urlwatch on macOS
- Install Homebrew if it is not already available on your Mac.
- In Terminal, run
brew install urlwatch. The Homebrew urlwatch formula provides the install command and shows current package and macOS details; those can change over time. - Run
urlwatchonce. This initializes or migrates urlwatch’s data files.
The project documentation describes setup and command behavior in its introduction. Homebrew listed macOS bottle support when the formula was checked, but the formula page is the place to confirm current package details.
Configure your first monitoring job
Run urlwatch --edit to open the YAML job list, urls.yaml. Add one or more jobs for the content you want checked. Run urlwatch --edit-config to edit global settings, including reporter configuration.
Choose the right job type
url: Fetches a page directly. Start here when the content is present in the page response and does not require browser-side JavaScript to appear.navigate: Loads a page in a headless browser. Choose it when ordinary URL retrieval does not return the content you need because the page depends on JavaScript. Browser jobs use more resources.command: Runs a shell command and monitors its output.
The urlwatch guide documents these job types, filters, and configuration commands. Use the simplest job that captures the content you care about; browser rendering is not necessary for every page.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware match#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Reduce noisy page changes with filters
A whole-page comparison may report changes that do not matter to you. Filters let you focus or normalize the output before urlwatch compares it. The guide describes CSS and XPath selection and text, JSON, PDF, and other filters; filters can also be chained. For example, select a page element that contains the price or status you care about rather than monitoring unrelated page content.
Run a manual check and understand the result
After saving the YAML job list, run urlwatch in Terminal before creating a schedule. It retrieves or executes each job, applies its filters, compares the processed result with the previous output, and reports detected changes. This first manual run is useful for confirming that jobs work and that the result contains the relevant content.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
By default, you can inspect reports in the terminal. urlwatch also supports configured reporters such as email and third-party services. External destinations need to be configured in the global settings; change notifications can include the changed URL and a unified diff. See the urlwatch project for its overview of change reporting.
Schedule recurring checks with cron
On macOS, the documented scheduling approach here is cron. Each execution runs urlwatch, so the cron schedule sets the checking interval. The project recommends not running checks more often than every 30 minutes.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
- Open your crontab in Terminal:
crontab -e. - Add a schedule line for urlwatch. The guide’s example for every 30 minutes is
*/30 * * * *; the command follows the schedule fields, for example*/30 * * * * /path/to/urlwatch. - Save and exit the editor. If the command is not found when cron runs, use the full path to the urlwatch executable rather than relying on the interactive shell’s PATH.
- Confirm the schedule and output behavior on your Mac, including any reporter configuration needed to receive results when Terminal is closed.
To find the executable path for your installation, run which urlwatch in Terminal and use the resulting path in the crontab command. The cron example and interval guidance are documented in the urlwatch introduction.
Choose retrieval, filtering, and reporting deliberately
| Decision | Use this when | Trade-off |
|---|---|---|
| Direct URL versus browser navigation | Use direct retrieval when it exposes the needed content; use browser navigation when JavaScript is required. | Browser jobs are more resource-intensive. |
| Whole page versus filtered content | Monitor the whole output for broad changes, or select and normalize a meaningful part when unrelated page changes create noise. | A filter narrows what is compared, so choose it to match the change you actually need to notice. |
| Terminal versus configured reporter | Use terminal output for manual inspection; configure a reporter when notifications need to go elsewhere. | External destinations do not work until configured. |
Troubleshoot common setup problems
brew install urlwatch fails
Check the current Homebrew formula for the supported package details and install instructions, then retry. Package versions and dependencies can change.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
A job returns no useful page content
If a page populates its content with JavaScript, an ordinary URL job may not capture the rendered result. Try a navigate job instead, and account for its greater resource use. If the content is present but the report is noisy, use a filter to compare the relevant element or content.
Cron runs but the expected command is not found
Cron may not use the same PATH as your interactive Terminal. Run which urlwatch and put the executable’s full path in the crontab entry.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
No email or external notification arrives
Running a job does not by itself configure an external destination. Use urlwatch --edit-config to configure the desired reporter, then test a manual run and inspect its output.
Or skip the browser setup
If your goal is a clean screenshot rather than change monitoring, ScreenshotNeo is a website screenshot API and MCP server. A single GET request can return an image or PDF; it is not a replacement for urlwatch’s recurring change detection.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. It removes cookie banners, newsletter popups, and chat widgets before capture; bot checks, blank pages, and failed loads are not billed. Its MCP server lets AI agents take screenshots. The Free plan includes 1,000 screenshots a month with no card, and paid plans start at $5 for 3,000.
Sign up for ScreenshotNeo free to get 1,000 screenshots a month with no card.
Free tools Windows power users keep installed
One-click scans. No signup required.
Frequently Asked Questions
Does urlwatch need to stay open in Terminal to check websites?
No. The cron entry runs urlwatch on its schedule; use a configured reporter if you need results delivered outside the terminal.
Can urlwatch monitor a shell command as well as a website?
Yes. Its documented job types include command for running a shell command and monitoring its output.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
