updating from Big Sur 11.7.8 to Ventura

May it be suggested to refer to an Other question for a possible answer

updating from Big Sur to Ventura - Apple Community

FYI - Apple M1 of M2 computers by Default will Not Boot from Any External Drives

It would require tinkering with the Startup Security Setting

If macOS Ventura has been released since then, you can typically update your macOS in the following way:

1. Check Compatibility: Before updating, make sure your Mac is compatible with the new macOS version. Apple usually provides a list of supported devices on their website.
2. Backup Your Data: It's always a good idea to create a backup of your important data before performing any major updates. You can use Time Machine or other backup methods.
3. Download and Install:

• • Software Update: Apple usually provides notifications when a new macOS update is available. You can click on the Apple menu in the top left corner of your screen, then choose "Software Update." Follow the on-screen instructions to download and install the update.
  • Mac App Store: In some cases, you might also find the update in the Mac App Store. Open the Mac App Store, go to the Updates tab, and see if macOS Ventura is available for download.

1. Install the Update: Once the update is downloaded, the installation process will begin. Your Mac may need to restart multiple times during the installation.
2. Follow On-Screen Instructions: Follow any on-screen prompts or instructions during the installation process. You might need to agree to terms and conditions, enter your Apple ID password, and make other selections.
3. Post-Installation Setup: After the update is successfully installed, you'll likely need to go through a post-installation setup process, similar to when you first set up your Mac.

Please note that the steps provided might vary based on the specific update process for macOS Ventura or any changes that might have occurred since my last update. Always refer to official sources for the most accurate and up-to-date information.

If u have done creating bootable installer,

restart or shut down your mac and reopen press option key to select your start up disk option to choose ventura disk.