Reboot: fastboot reboot . Done. There is one narrow exception: Recovery RAMDisk devices (some older Xiaomi/OnePlus phones where Magisk is installed into the recovery partition). Even then, you should patch your own stock recovery image.
Run this command in your terminal/command prompt: magisk boot image download
The only time downloading a boot image might be acceptable is from a in an official device forum (like XDA Recognized Contributors), but even that carries residual risk. Real developers will always tell you to patch your own. Final Verdict: Do It Yourself or Don’t Do It at All The search for a "Magisk boot image download" is a trap for impatient users. It promises speed but delivers risk – ranging from a frustrating bootloop to complete financial compromise. Reboot: fastboot reboot