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analog - Line-in recording w/ 2012 iMac possible? - Sound ...
https://sound.stackexchange.com/questions/22358/line-in-recording-w-2012-imac-possible#:~:text=You%20can%20double-check%20by%20selecting%20About%20This%20Mac,you%20probably%20don%27t%20have%20line-in%20in%20your%20mac.
iMac Line-Input for audio - Apple Community
https://discussions.apple.com/thread/8016009
iMac Line-Input for audio. I've noticed my 2017 iMac doesn't have a line-in for audio. I've read I can use the headset jack as a line-in for the audio by changing the settings on the sound input, but the only option available is the built in microphone. There is no option to change input to line-in.
analog - Line-in recording w/ 2012 iMac possible? - Sound ...
https://sound.stackexchange.com/questions/22358/line-in-recording-w-2012-imac-possible
The Late 2012 27" iMac does not appear to have line-in, just a headphone port. I'm not sure which model you have, but if the 27" doesn't have it, I doubt the smaller ones will. You can double-check by selecting About This Mac from the Apple menu. Then click the More Info button and then the System Report... button. Next, click on Audio to the left.
How do I get a stereo line input on my ne… - Apple Community
https://discussions.apple.com/thread/8581737
If you want to record instruments on your Mac, use USB, Thunderbolt, or FireWire audio interface devices. You can use XLR, 1/4-inch phono, RCA, S/PDIF, or MIDI. Some Mac compatible interfaces are Alesis, Apogee Digital, Roland, MOTU, and PreSonus. Depending on the audio interface you will be using, you may need a USB-C adapter as well:
New iMac, Why "Audio Input" is missing? - Apple Community
https://discussions.apple.com/thread/4461241
I always did better with a line-direct from my Onkyo regular receiver (not USB) to the audio in port on my previous Mac. It was perfect for recording vinyl, cassettes, and my own audio files. Moreover, a simple patch betwen the headphone and "In" audio port enabled sure and unfailing recording of any audio from the computer (the $90 Roxio Toast ...
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