To prevent Chrome from automatically updating on Mac, it can be done by disabling update services, modifying permissions, and restricting network access. 1. Use terminal commands to disable the GoogleSoftwareUpdate daemon to prevent background updates; 2. Modify update directory permissions to prevent Chrome from starting the update process by itself; 3. Restrict Chrome's outbound network connection through system firewall or third-party tools to further eliminate update requests. Using these methods in combination can effectively prevent Chrome from being automatically updated.

When Chrome spelling check fails, you can troubleshoot and fix it by following the following steps: 1. Confirm that the "Use Spelling Check" function is enabled and check whether the corresponding language is enabled in the language settings; 2. Adjust the input language order, delete the redundant language, and ensure that the main language enables spelling check; 3. Close possible conflicting extensions, especially syntax or translation plug-ins; 4. Update Chrome to the latest version and check the operating system updates. If it still doesn't work, try resetting Chrome settings.

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If you cannot select PDF text in Adobe Acrobat, it is usually because the content itself is not optional text. Common reasons include: ① PDF is a scanned image or an image-based file. At this time, Acrobat's OCR function needs to be used for identification; ② The text is located in an embedded object or layer, you can try to click on the text block using the TouchUp text tool; ③ PDF has set security restrictions, you can view permissions in the properties and enter the owner's password to unlock the restrictions; ④ Font embedding problems or file corruption, you can try to export it as an image, re-export it by printing, or open it with another PDF editor. These issues have nothing to do with Acrobat itself, but are determined by how PDFs are created.

To let Chrome download directly instead of opening it when clicking on the PDF link, 1. Enter chrome://settings/content/pdfDocuments to check "DownloadPDFfilesinsteadofautomatically opening theminChrome"; 2. Check whether there are plug-ins such as Lightpdf or Smallpdf interfering behavior, you can try to disable the test; 3. You can use the developer tools to copy the link and paste the new tag to trigger the download. The above methods can be selected according to the situation.

The problem of Chrome automatically popping up new tabs is usually caused by malicious extensions, advertising scripts, or browser hijacking. The solutions are as follows: 1. Check and uninstall suspicious extensions, especially ad-class plug-ins; 2. Clear browser caches and cookies to eliminate data corruption; 3. Check whether the homepage and default search engine settings have been tampered with and manually corrected; 4. Use antivirus software such as WindowsDefender or Malwarebytes to scan and clear potential malware; 5. Finally, try resetting Chrome settings to restore the default configuration. Troubleshooting in this order can effectively solve most abnormal labeling problems.

The screen tear occurs when the Chrome browser scrolls, which is usually caused by the out-of-synchronization of rendering and refresh. The solutions are as follows: 1. Ensure that hardware acceleration is enabled, you can manually check the settings and restart the browser; 2. Forcefully enable Compositor and related options to optimize rendering; 3. Check the display refresh rate, use single-screen testing, and enable VSync or adaptive synchronization technology on supported devices; 4. Update the graphics card driver or replace the display interface such as using the DP interface. It is recommended to start the troubleshooting with simple steps and gradually adjust to find the best configuration.

The problem of Chrome sync stuck can be solved through the following steps: 1. Check the network connection and Google account status to ensure normal access; 2. Log out and log in to the Chrome account again; 3. Clear the synchronized data and restart the browser; 4. Reset Chrome settings; 5. Try the traceless mode or new user profile. Sequentially checking can effectively restore the synchronization function.