Version Numbering in Apple Operating Systems

Thank you for purchasing the mini e-book. We hope you find immense value in the content.

As an e-book seller on Gumroad, we strive to provide high-quality products and excellent customer service. Due to the nature of digital products and the inability to physically return items, we have a strict no refund policy in place.

Once a purchase is made and the e-book is delivered to you electronically, we are unable to issue any returns or refunds. All sales are final.

We encourage you to thoroughly review the product description and any available previews before making your purchase decision. If you have any questions or concerns about the content or format of the e-book, please don't hesitate to contact us before completing your purchase. We're here to assist you and ensure you have a positive experience with our product.

By completing the purchase, you acknowledge and agree to our no refund policy.

Thank you very much for your understanding.