Hi...
I have two issues going on... I am not sure if they're related. the iMac is not recognizing SD cards when inserted into SDXC slot.
My computer is also running slow.
Please help...
iMac 21.5″, macOS 12.6
Reset the SMC and test the SD card slot.
see > Reset the SMC of your Mac - Apple Support
You need to get an external hard drive for Time Machine backups.
see > Back up your Mac with Time Machine - Apple Support
Your Fusion Drive is split.
see > How to fix a split Fusion Drive - Apple Support
Basically you need to fix the Fusion Drive, Reinstall macOS and then restore from your Time Machine backup.
Reset the SMC and test the SD card slot.
see > Reset the SMC of your Mac - Apple Support
You need to get an external hard drive for Time Machine backups.
see > Back up your Mac with Time Machine - Apple Support
Your Fusion Drive is split.
see > How to fix a split Fusion Drive - Apple Support
Basically you need to fix the Fusion Drive, Reinstall macOS and then restore from your Time Machine backup.
My iMac stopped recognizing SDXC slot and running slow
