Macbook Pro Audio line in stopped working after Leopard install

I was having a similar problem on my MB Pro until I left the internal mic choice checked instead of the line in. Seems on my computer, at least, that the external mic when plugged in over rides the internal mic. So just leave it checked for internal mic when you plug in an external mic it should work.

Trailergirl hit the nail on the head. Apple appears to have made the mic like the speaker. plug in a line in or line out and it overrides the built in mic or speakers.

I did a simple test - I used the 'Sound' System preference and the 'Input' tab.
I set input for 'Internal Mic' and used a Logitech headset with a separate audio plug for mic and speaker. Then I cupped my hands around the mic and whispered into it. The input level graph showed audio input.

I think the main problem is that the new methodology is messing with our heads.

I have been having the same problem and this worked for me:

-Open Utilities/Audio MIDI Setup
-Choose the Audio Devices tab
-From the menu choose Audio/Open Aggregate Device Editor
-Click the "+" button to add a new item
-Select it and check off the "Built-in Input"
-Give it a name

Then you can choose that device in your audio software and you're good.

Hope this helps!

Andrew

I am having the same problem. Since installing Leopard, my line-in port has ceased to work. I have an unpowered mic, but it worked perfectly before the upgrade.

Any ideas on how to solve this?

My Mac Pro tower(10.5.1) is doing the same thing. I have a mixer between the mic and the mac, if I overdrive it to ridiculous levels the control panel sees the input but it is ramped out and over driven. I have tested this exact setup on an intel mini (10.4.11) and an intel Mac Book (not pro, running 10.5.1) and neither of these machines exhibit the problem. I will pursue this with apple, any help is appreciated.

string

I can confirm this: The audio line-in port is accepting no signals, since i upgraded to leopard. This happens on an iMac CoreDuo and on a Mac Mini Core2Duo.

Message was edited by: Axel7

I'm seeing the same thing on my macbook pro.

Me too - exact same problem. Mac Pro - no LINE IN signal. Tried with several microphones.

Me too - exact same problem. Mac Pro - no LINE IN signal. Tried with several microphones.

Same for me. The first posts in this thread seem to be older than a month - is there still no fix for this issue?

I have a Core2Duo Macbook Pro.

Any word on this yet?

My brand new Mac Pro 2.8 has the same problem. The microphone for the headset I use for Skype does not work when plugged into the audio line input on the back of he machine.

I got a response from Apple Tech 2 after wasting time with Tech 1 for an hour. Pretty simple result. The Audio Line-in does not supply power a microphone, such as in a headset that does not have it's own power supply. I can use my headset with a usb adaptor no problem.

I also have this problem but with a slightly different twist..

I was using my plantronics (old ms gamevoice headset) with 10.5.2 and it worked, then installed the m-Audio Firewire Audiophile beta drivers and neither the audio-in or the m-audio audiophile line-in cause any VU-meter response (nor input) whereas the standard inbuilt microphone does.
After uninstalling the m-audio drivers the situation is still the same.

Oddly - if I plug in the headphones into the line-in (rather than microphone) then speak into them I actually get input audio (and VU-meter response) through the MBP's audio-in.

So the story about no power is used (hence the headphones create enough to register the sound) sounds about true... very annoying as I thought my old headset had died and went out and bought a new one.. that still doesn't explain the audiophile input issues..

Now I fully expect both companies to point fingers at each other.. I don't care - just get it fixed please.

Hey, I had the same problem with my MacBook. This little freeware app from Rogue Amoeba nicely solves the problem. I wanted to record using the line input with my guitar in GarageBand.

The name of the app is "LineIn"

http://www.rogueamoeba.com/freebies/