8-in-1 iMac USB Adapter with HDMI 4K@60hz - Adds Ports for iMac 24in

Our review of this 8-in-1 iMac USB adapter finds it is best for iMac 24in owners who need accessible ports and a simple way to add an external display. The adapter snaps into the slot on the back of the 24in iMac models and brings two USB 3.0 ports, two USB 2.0 ports, a Type-C port, an SD/micro SD card reader and an HDMI output that supports 4K@60hz. For anyone frustrated by the limited ports on the thin iMac edge, this accessory turns the rear slot into a practical hub without needing to flip the display around.

Key Features

• 8-in-1 design: Consolidates multiple ports into one tidy module so users can connect storage, input devices, and peripherals without extra dongles.
• 4K HDMI output: The HDMI port supports 4K@60hz and both mirroring and extended display modes to expand screen real estate for multitasking.
• High speed transfers: USB 3.0 and Type-C ports deliver up to 5Gbps transfer speeds for quick file movement between drives and your iMac.
• Convenient card reader: Built-in SD and micro SD slots allow simultaneous reading of both cards, speeding access to photos and video files.
• Designed for iMac 24in: The form and fit are made specifically to hook into the rear slot of 2021 and 2023 24in iMac models for a near-seamless look.

Who It's For

This adapter is aimed squarely at owners of the 24in iMac (M1, M3 and M4 era models) who want to avoid constantly reaching around the back of the display to plug in devices. Photographers and content creators who need quick access to SD and micro SD cards will value the front-facing card reader and simultaneous card access.

It is less suitable for users of other iMac sizes or desktop setups that already use a powered docking station with extra USB-C power delivery; the hub is a purpose-built, compact port expander rather than a full desktop dock replacement.

Pros & Cons

Pros

• Adds a wide range of ports in one installed unit for cleaner cable management.
• Supports 4K@60hz HDMI output for a sharp external display connection.
• USB 3.0 and Type-C ports provide fast 5Gbps data transfer for external drives.
• SD/micro SD reader is front-facing and can read both card types at once.

Cons

• Fit and installation vary slightly by user; a few customers reported the setup felt fiddly or required careful alignment.
• Only compatible with the 24in iMac; not a universal iMac solution.

Specifications

Product type	iMac 24in USB adapter
Ports	2x USB 3.0, 2x USB 2.0, 1x Type-C, SD/micro SD reader, 1x HDMI
HDMI capability	4K@60hz, mirroring and expansion
USB transfer speeds	USB 3.0/Type-C up to 5Gbps, USB 2.0 up to 480Mbps
Card reader	SD and micro SD readable at the same time
Compatibility	Designed for 24in iMac models (2021 M1 and 2023 M3)

Our Verdict

The 8-in-1 iMac USB adapter is a practical, value-minded accessory for 24in iMac owners who need extra ports and an easy way to connect an external 4K monitor. It integrates cleanly into the rear slot, brings fast USB 3.0 and Type-C transfers, and eliminates the need for separate card readers. If you own a 24in iMac and want fewer dongles and quicker access to cards and USB devices, this is a sensible addition.

Frequently Asked Questions

Will this fit any iMac?
It is made specifically for the 24in iMac models (2021 M1 and 2023 M3) and is not supported on other iMac sizes.

Can the HDMI output run an extended display?
Yes, the HDMI supports both mirroring and extension modes and up to 4K@60hz when connected to a compatible monitor.

Can I read SD and micro SD cards at the same time?
Yes, the hub supports simultaneous reading of SD and micro SD cards for faster media transfer.