First establish whether the site actually requests a screen wake lock. Then check that the page remains visible and its lock is active. A pointer animation alone is not a wake request, and a browser wake lock is not a guarantee about every form of Mac sleep.
Describe the symptom before changing settings
“It stopped working” can mean the display went dark, a transfer paused, the Mac locked, or a chat status changed. Write down which result you observed and whether you had switched tabs, minimized the browser, or changed power sources first.
Those observations point to different checks. A page can remain loaded while its wake request is no longer active. A completed browser animation also says nothing about whether an upload reached its destination.
Check what the site claims to do
Look for an explanation of the mechanism and a status showing whether a screen wake lock was acquired. If the page only displays a moving pointer or counts simulated events, that is not enough evidence that it prevents screen sleep.
A request to install an extension or helper changes the troubleshooting path. Check the documentation for that software instead of assuming all “online mouse jiggler” sites use the same browser feature.
Repeat the test with the page visible
Chrome’s wake-lock documentation explains that the document must remain visible and that the system can release a lock. Keep the tool in the active tab during a short, supervised check, then compare the result after changing tabs.
If it works only while visible, the behavior may follow the browser feature’s limits. Returning to the page can require the website to request another lock. Look for an updated status instead of relying on a Start button you pressed earlier.
Check browser and power conditions
Use a current supported browser and the tool’s secure HTTPS page. Record the browser name and version if the request fails. Follow the site’s own support information rather than changing unrelated permissions.
Battery and power-saving conditions can cause a request to be rejected or released. Try the same short check under your normal power arrangement and note the result. Do not turn off Mac security protections to make a browser timer run.
Separate a dark display from an interrupted task
If the display turns off but a download continues, you may be observing display sleep rather than system sleep. If the download fails while the display is still bright, inspect the transfer itself and the network connection.
Use our sleep-state explanation to identify the symptom. For task-specific checks, see uploads and downloads. Repeatedly pressing a browser’s Start button will not repair an unrelated connection failure.
Choose the next test from the result
If a visible browser reference is your whole task, a working screen-wake tool may be sufficient. If you need movement across applications or a weekday schedule, compare browser tools and native Mac apps.
Send the site’s support team the URL, browser version, Mac version, power source, and exact steps that released the lock. Describe an observed failure, such as “switching tabs changed the status to inactive,” rather than assuming the cause.
Make your next session simpler.
Explore Mouse Jiggler’s menu-bar movement, timing, and scheduling controls.
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