Some Mac computers feature an SD (Secure Digital) or SDXC (Secure Digital Extended Capacity) card slot that lets your Mac read and write data to SD media, such as digital camera memory cards. A Micro Secure Digital slot (MicroSD slot) is a small expansion slot located in mobile and other portable devices. It facilitates the increase of available memory via the insertion of a MicroSD card. MicroSD, MiniSD and SD are industry standard storage platforms governed by the Secure Digital Association (SD Association). The first capacity type is the standard SD card which supports cards of up to 2 GB in capacity. Next comes the Secure Digital High Capacity (SDHC) type for cards over 2 GB and up to 32 GB. After that, we have the Secure Digital Extended Capacity (SDXC) cards which offer storage capacity between 32 GB and 2 TB.

Apple Compatible iMac SDXC - SDHC - SD Cards

Prices and offers are subject to change. © 2020 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, MY BEST BUY, and BESTBUY.COM are. Secure Digital (SD) cards are flash memory cards that comply with standards set by the SD Association. Hemera/ Thinkstock Many laptops and mobile devices you can buy today have built-in slots for Secure Digital memory cards, usually just called SD cards.

Aluminum Intel iMac SD Slot Location

Starting with the glass panel unibody aluminum iMac desktop computers, Apple started including an SDHC card slot on the right-hand side of the machines located just below the SuperDrive CD/DVD burner opening.
Later models revised the slot to support SDXC - (e)Xtended Capacity cards up to 1 Terabyte. So the model / year of your iMac system will determine if it’s SD and SDHC compatible, or if it’s a later model that also supports SDXC as well.

Slim Aluminum Retina iMac SDXC Slot Location

Apple continued to include an SDXC compliant, SDHC - SD backward compatible Secure Digital memory card slot on the slimmer aluminum iMac systems. This revision moved the slot the rear of the iMac alongside the audio, Gigabit ethernet, USB 3.0 and ThunderBolt ports instead of on the right-hand side of the display. The slot remains on the latest Thunderbolt 3 Retina iMac's as well.

iMac SDXC Card	SDXC Card For iMacs	SDHC Card For iMac
SanDisk Extreme Pro SDXC Up To 95MBps Speed	PNY Elite SDXC Card Up To 90MBps Speed	Transcend Class 10 Up to 90MBps

Slots 1 - Secure Digital (sdxc)

Secure Digital (sdxc) Slot Machine

Secure Digital (sdxc) Slot Voice Recorder

With the latest generation of Secure Digital flash memory SD cards at the high-end, we're seeing Read / Write speeds rivaling and outperforming conventional mechanical hard drives. So, not only has capacity increased but speed has increased greatly - though the data rates still fall far short of full-blown solid-state drives.