Is there another device other than the Griffin imic?

I don't know of one, although you may try googling. When I googled the imic, others popped up. Can't recommend any since I have not tried any.

cash2019 wrote:

Is there another device other than the Griffin imic that would allow for audio input for Macbook Pro? analogue to digital. The imic is discontinued

what exact Mac /model /year /size /retina /touchbar is this ?

I did not think too highly of that Griffin imic.

Older machines have a analog/digital in/out ports

The port can be used to plug in an external microphone, audio device or recording equipment. Just plugging a device into the port doesn't make it active by default. You will have to choose Line In instead of the Internal Microphone in System Preferences

Play high sample rate digital audio on Mac computers - Apple Support

13-inch MacBook Pro (old and new), Apple includes the option of a switchable audio port than can be used as either an input or an output. ... You'll get instant access to your audio port settings.

New MacBook Pro drops optical audio out through headphone jack. ... Additionally, the system profiler's report on the 13-inch MacBook Pro has no listing for S/PDIF Optical Digital Audio Output, while the 2012 and 2015 Retina MacBook Pro models do.

Identify the ports on your Mac

https://support.apple.com/en-us/HT201736

I don’t use it much any more, but my iMic still works on my 2012 MBP. It wasn’t the best, but certainly worth more than what it cost when I wanted to import dozens of music tapes and records to my Mac. I just found some on ebay, just be careful there that they will accept returns if needed.