The version number you provided (10.13.6) is the final release of High Sierra. There is no version 10.13.136. This guide assumes you meant updating from macOS High Sierra 10.13.6 to macOS Catalina 10.15.x (the immediate successor to Mojave, as High Sierra cannot directly jump to newer OS versions like Ventura or Sonoma on most older hardware).
Before any major OS upgrade, use Time Machine to back up your data to an external drive. Updates can fail, and data loss is a real risk.
You now have macOS Catalina. However, several essential tasks remain. how to update macos high sierra 10136 to 1015
Ensure you have at least on your startup drive.
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to back up your files, as major OS upgrades can occasionally fail. Check Disk Space : Ensure you have at least of available storage if upgrading from High Sierra. Software Note : Catalina does not support 32-bit apps . Use a tool like to identify apps that will stop working after the update. Apple Support Community 3. Download and Install
To check your space, go to the > "About This Mac" > "Storage" tab. If you're running low, you can free up space by: The version number you provided (10
Before you begin, you must ensure your hardware can handle Catalina. Generally, if your Mac was made in , it is compatible. MacBook: Early 2015 or newer MacBook Air / Pro: Mid 2012 or newer iMac: Late 2012 or newer Mac mini: Late 2012 or newer Mac Pro: Late 2013 or newer Step 2: Essential Pre-Upgrade Checklist
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user wants a long article on updating from macOS High Sierra 10.13.6 to macOS 10.15 (Catalina). I need to follow the search plan and provide a comprehensive guide. I'll start with the first round of searches as outlined. the first round of searches, I have gathered some initial information. For the second round, I need to address the specific queries about data backup, creating a USB installer, and troubleshooting issues. I'll search for these topics now. second round of searches has provided specific guides and troubleshooting steps. Now I need to synthesize this information into a comprehensive article. The article should cover: preparation (compatibility check, backup, 32-bit apps), obtaining the installer (from App Store or direct download), creating a USB installer, performing the upgrade, and troubleshooting. I'll cite the relevant sources. open pages provide a good amount of detail. Now, for the third round, I need to cover advanced scenarios like unsupported Macs and alternative installation methods. I'll search for these now. search results provide information on patchers and external drives. The final round of searches will focus on post-upgrade checks and troubleshooting installation issues. will now synthesize the information gathered into a long-form article. The article will cover why upgrade, preparation (compatibility, backup, 32-bit apps), downloading and installing, troubleshooting, post-upgrade steps, and advanced scenarios. I will cite the sources appropriately.grading an operating system is a significant step, and moving from macOS High Sierra (10.13.6) to macOS Catalina (10.15) is no exception. While a few years old, Catalina still offers a more secure and feature-rich environment than an unsupported High Sierra system. This guide provides a complete, end-to-end walkthrough to ensure your upgrade is safe and successful.
Any application marked will not function on macOS Catalina. You must find alternative software or purchase upgrades before proceeding. Step 4: Back Up Your Mac Before any major OS upgrade, use Time Machine