You can download and install the latest Magisk files from here. SuperSU was taken down from the Play Store years ago and Magisk is not allowed on the Play Store either.
Once you open the Magisk app, you want to patch a boot image. This is done by downloading the firmware for your smartphone, extracting it, and then checking in your File Explorer for the boot.img folder containing the boot image. Most smartphones have the boot.img inside the firmware folder and it is easy to find.
Note that some smartphones use the A-only partition scheme. If yours is one of them, you can find the boot image (boot.img) file inside the recovery-flashable ZIP file.
On the other hand, if your smartphone has the A/B partition scheme, the boot image (boot.img) is found in the file named payload.bin.
See also: How to Extract boot.img from Samsung Firmware
Where you get the firmware for your smartphone will depend on what manufacturer you use. Many manufacturers provide firmware files; however, some of the largest brands do not. Samsung is one brand that does not provide firmware; however, there are tools that allow you to download the Samsung firmware directly from Samsung’s servers. Tools such as SamFirm_Reborn Tool, Bifrost – Samsung Firmware Downloader Tool, or Frija let you download Samsung firmware files to your computer so you can extract them and locate the boot.img files.
July 3, 2022 @ 11:53
Thanks for this. Getting the boot image was all I needed to know. Magisk makes it easy to understand how to use it thankfully. But I am getting an error in Magisk saying that my boot image failed to patch. It then goes on to say that my boot image is an unsupported image format. I wasn’t aware that my boot image could have different formats. How can I find out what my format is and what formats are compatible with Magisk? thanks.
I think I’ll give up on Magisk for now because something tells me I’m never going to solve this problem for my smartphone.
July 3, 2022 @ 11:49
Nice post. The next thing you want to do is patch the boot image which not everyone knows how to do. But thankfully it’s very easily done from Magisk. You need to have Magisk installed, open it up, and then click on the Install button on the Magisk card. Then, under the Method heading, tap on Select and Patch a File and then select the boot image file from your computer. The Magisk app on your smartphone will then patch the boot image for you.