A macbook is a very powerful device and has a good storage space, hence it can contain various forms of data in them. People can store various personal and professional data in their macbook. Personal information like photos, videos and even financial information are stored in the macbook, whereas people store their work related classified information in the macbook.
Hence if the person selling the old macbook does not delete all the data then all this data could end up in the hands of the person or the company who is buying the old macbook. If all this data falls into the half of any other person and they have any malicious intent, then they can harm the original owner of the macbook.
Since, the macbook contains crucial financial information like banking details, this information can be used to harm the original owner financially. This can lead the original owner to financial ruins and a huge loss of money.
Most people also store their work related classified information in their macbook, hence if this information is leaked then it can laos cause various problems for the original owner of the macbook.
For all these reasons, it is very important for people to delete all of the data stored in the macbook and avoid any such conditions.
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