Apple iMac 21.5 Inch, intel Core i5 2.5GHz, 16GB RAM, 1TB HDD

Using your Apple iMac is a breeze. First, connect it to a power source and turn it on. You can start by setting up your user account and connecting to Wi - Fi. For everyday tasks like web browsing, just open Safari or your preferred browser. To check emails, use the built - in Mail app. When it comes to video conferencing, the 720p FaceTime HD camera and stereo speakers will give you a great experience. For those interested in creative work, the powerful processor and graphics card can handle it well. When it comes to maintenance, keep your iMac in a cool, dry place. Don't block the ventilation ports. Regularly clean the screen with a soft, dry cloth. And make sure to update your macOS regularly for better performance and security. If you want to downgrade the macOS, you can do it for free as long as you follow the official instructions. Also, be careful when connecting external devices to avoid any damage to the ports.