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Hi NARELLY,
Can you describe your problem in more details?
What AutoCAD version you are trying to install? (if you are really trying to install AutoCAD and do not do anything else)
I don't see information about macOS version on the Disk Info window you attached, so it appears you are trying to install AutoCAD on non-system disk (partition). If so, you cannot install AutoCAD on it. AutoCAD can be installed only on System partition, where macOS is installed.
Maxim
