Can I simultaneously record audio on Quicktime and iMessage? Also, how large of a recorded audio file can I send from my MacBook Air to an iPhone 5c via iMessage?

Good Morning mattb1738,

I understand you want to record audio on your Mac and send it to your iPhone, but I'm not sure how the Messages app plays into this. Can you provide a little more information as to what you want to accomplish? Are you trying to record a vocal or voiceover or are you recording instruments? Quicktime is one application you can use to record audio, GarageBand is another. With GarageBand you can export audio files to iTunes or to a file on your computer. If the audio file is large, you can get it from your Mac to your iPhone via AirDrop. Messages can be sent from your iPhone or your Mac.

Matt, I'll send you a few resources to get you started. If I'm off track here regarding your needs, please reply back when it is convenient.

Mac Basics: QuickTime Player creates, plays, edits, and shares video and audio files - Apple Support
https://support.apple.com/en-us/HT201066

Before recording audio - GarageBand Help
https://help.apple.com/garageband/mac/10.1/#/gbnd4c2cc43e

Export songs to disk - GarageBand Help
https://help.apple.com/garageband/mac/10.1/#/gbnd7cbf5ed9

Use AirDrop to send files from your Mac to another nearby Mac or iOS device - Apple Support
https://support.apple.com/en-us/HT203106

Use Continuity to connect your iPhone, iPad, iPod touch, and Mac - Apple Support
https://support.apple.com/en-us/HT204681

SMS

With Continuity, all the SMS and MMS text messages you send and receive on your iPhone also appear on your Mac, iPad, and iPod touch. Even if the person you’re communicating with doesn’t have an iPhone. And regardless of what phone they have, you can reply from whichever device is closest to you, including your iPad or Mac. You can also initiate a conversation by clicking a phone number in Safari, Contacts, or Calendar.

To use Continuity for SMS and MMS with your iPhone and your Mac, iPad or iPod touch

Your iPhone, iPad, and iPod touch need to use iOS 8.1, and your Mac needs to use OS X Yosemite.

1. Sign in to iMessage on your iPhone, your other iOS devices, and your Mac using the same Apple ID.
2. On your iPhone: Go to Settings > Messages > Send & Receive > You Can Be Reached By, and add a check to both your phone number and email address. Then, go to Settings > Messages > Text Message Forwarding, and enable the device(s) you would like to forward messages to.
3. Your Mac, iPad, or iPod touch will display a code. Enter this code on your iPhone to verify the SMS feature.

Cheers!