Apple iMac Retina 5K 27" - 512 GB storage - 16 GB RAM - Intel Core i5

No, this is a refurbished model. It is classified as "Good Grade," which means it may have slight cosmetic scratches visible from over 20 cm, but it is fully functional and has been tested.

For some 27-inch iMac models, RAM can be user-upgraded via an access panel on the back. However, accessing and upgrading the internal SSD typically requires specialized tools and expertise, and may void any remaining warranty. It is generally not considered user-upgradable without professional assistance.

Your iMac will arrive with a recent version of MacOS that is compatible with its hardware. You can update to the latest supported version of MacOS via `System Settings > General > Software Update`.

Info needed: [Please refer to the product listing or included documentation for a precise list of accessories, such as Apple Magic Keyboard, Magic Mouse, and power cord.]

Yes, you can connect an external monitor to your iMac using its Thunderbolt/USB-C ports. Depending on the external monitor's input type, you may need an appropriate adapter (e.g., USB-C to HDMI, USB-C to DisplayPort).

This iMac is excellent for general productivity (office work, web browsing), streaming high-resolution content, photo editing, and lighter video editing tasks. Its powerful processor, ample RAM, and stunning Retina 5K display make it ideal for visually intensive work and everyday computing.

To perform a factory reset, you'll need to back up all your important data first. Then, restart your iMac and immediately hold down the `Command + R` keys to boot into macOS Recovery. From there, you can use Disk Utility to erase your startup disk and then reinstall macOS.

Ensure the power cable is securely plugged into both the iMac and a working power outlet. Try a different power outlet or power cable if possible. Confirm the power button (located on the lower-left rear) is pressed firmly.

Adjust the brightness settings in `System Settings > Displays`. Restart your iMac. If using an external monitor (unlikely for an all-in-one but good to check settings), ensure its cable is seated correctly. Reset SMC (System Management Controller) by unplugging the power cord for 15 seconds, then plugging it back in and waiting 5 seconds before pressing the power button.

Close any unnecessary applications running in the background. Check your storage space in `System Settings > General > Storage` and free up space if it's nearly full. Restart your iMac to clear temporary files and memory. Ensure MacOS and all applications are up to date.

Restart your Wi-Fi router and modem. Restart your iMac. Check Wi-Fi settings in `System Settings > Wi-Fi` to ensure you're connected to the correct network. Try forgetting the network and reconnecting. Ensure there are no physical obstructions between your iMac and the router.

Try connecting the device to a different USB port on the iMac. Restart your iMac. Ensure any necessary drivers or software for the external device are installed and up to date for MacOS. If using a hub, try connecting directly to the iMac.