"Seeing a No Entry sign after a New Crucial M500 installation"に関する回答I have the same issue, I have made a USB Bootable mac catalina but when I restart and press option key and then select bootable usb drive it shows me no entry logo. After sometime it disappears and shows white screen and then gets restart after 20-30 sec. My SSD is already APFS formatted and have MacOS installed. What to do now? please help.