Rfmerch Said:
"corrupt MacOS?: i was following the steps of resetting my y (2017 Catalina) but i accidentally erased something now every time i turn the MacBook on the folder with the question mark shows up. i have also tried to install MacOs using the recovery but its saying its corrupt. help!"
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See a Question Mark?
Go here: If your Mac Starts Up to a Question Mark - Apple Support
Mount the Drive:
Boot into Recovery Mode (Hold Down: [Command + R] upon boot). Then, using Disk Utility, see if the Hard Drive is seen. If it is, then see if you need to click the “Mount’ button for it. Try rebooting once more. If of no success, then click unmount button, and then the mount button. Try rebooting once more.