Your Mac provides several tools to help you identify it. The simplest is About This Mac, available by choosing About This Mac from the Apple () menu in the upper-left corner of your screen. The other is the System Information app. Learn how to use these tools to identify your Mac.
If you don’t have your Mac or it doesn’t start up, use one of these solutions instead:
Tested: Apple's updated 2019 MacBook Pro butterfly keyboard. By Andrew O'Hara Saturday, May 25, 2019, 01:02 pm PT (04:02 pm ET) Apple made it a point to tell users that the new MacBook Pro has a. As someone who bought rocksmith for ps3 and 2014 for my macbook pro, I think my opinion is valid on this. I think there was quite a bit less lag on my macbook, though this may be because 2014 has less lag than the original. I'd say go for it on macbook if you have the cable and already are inclined.
- Find the serial number printed on the underside of your Mac, near the regulatory markings. It’s also on the original packaging, next to a barcode label. You can then enter that serial number on the Check Coverage page to find your model.
- The original packaging might also show an Apple part number, such as MLH12xx/A (“xx” is a variable that differs by country or region). You can match the Apple part number to one in the list below to find your model.
List of MacBook Pro models
MacBook Pro models are organized by the year they were introduced, starting with the most recent. Click the model name for detailed technical specifications.
MacBook Pro models from 2012 and newer can run the latest version of macOS. For models from before 2012, the latest compatible operating system is noted.
2019
MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,4
Part Numbers: MUHN2xx/A, MUHP2xx/a, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B
Tech Specs: MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,4
Part Numbers: MUHN2xx/A, MUHP2xx/a, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B
Tech Specs: MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
MacBook Pro (15-inch, 2019)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1, MacBookPro15,3
Part Numbers: MV902xx/A, MV912xx/A, MV922xx/A, MV932xx/A, MV942xx/A, MV952xx/A
Tech Specs: MacBook Pro (15-inch, 2019)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1, MacBookPro15,3
Part Numbers: MV902xx/A, MV912xx/A, MV922xx/A, MV932xx/A, MV942xx/A, MV952xx/A
Tech Specs: MacBook Pro (15-inch, 2019)
MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MV962xx/A, MV972xx/A, MV982xx/A, MV992xx/A, MV9A2xx/A
Tech Specs: MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MV962xx/A, MV972xx/A, MV982xx/A, MV992xx/A, MV9A2xx/A
Tech Specs: MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
2018
MacBook Pro (15-inch, 2018)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1
Part Numbers: MR932xx/A, MR942xx/A, MR952xx/A, MR962xx/A, MR972xx/A, MUQH2xx/A
Tech Specs: MacBook Pro (15-inch, 2018)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1
Part Numbers: MR932xx/A, MR942xx/A, MR952xx/A, MR962xx/A, MR972xx/A, MUQH2xx/A
Tech Specs: MacBook Pro (15-inch, 2018)
MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MR9Q2xx/A, MR9R2xx/A, MR9T2xx/A, MR9U2xx/A, MR9V2xx/A
Tech Specs: MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MR9Q2xx/A, MR9R2xx/A, MR9T2xx/A, MR9U2xx/A, MR9V2xx/A
Tech Specs: MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
2017
MacBook Pro (15-inch, 2017)
Colors: Silver, space gray
Model Identifier: MacBookPro14,3
Part Numbers: MPTR2xx/A, MPTT2xx/A, MPTU2xx/A, MPTV2xx/A, MPTW2xx/A, MPTX2xx/A
Tech Specs: MacBook Pro (15-inch, 2017)
Colors: Silver, space gray
Model Identifier: MacBookPro14,3
Part Numbers: MPTR2xx/A, MPTT2xx/A, MPTU2xx/A, MPTV2xx/A, MPTW2xx/A, MPTX2xx/A
Tech Specs: MacBook Pro (15-inch, 2017)
MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,2
Part Numbers: MPXV2xx/A, MPXW2xx/A, MPXX2xx/A, MPXY2xx/A, MQ002xx/A, MQ012xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,2
Part Numbers: MPXV2xx/A, MPXW2xx/A, MPXX2xx/A, MPXY2xx/A, MQ002xx/A, MQ012xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,1
Part Numbers: MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,1
Part Numbers: MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
2016
MacBook Pro (15-inch, 2016)
Colors: Silver, space gray
Model Identifier: MacBookPro13,3
Part Numbers: MLH32xx/A, MLH42xx/A, MLH52xx/A, MLW72xx/A, MLW82xx/A, MLW92xx/A
Tech Specs: MacBook Pro (15-inch, 2016)
Colors: Silver, space gray
Model Identifier: MacBookPro13,3
Part Numbers: MLH32xx/A, MLH42xx/A, MLH52xx/A, MLW72xx/A, MLW82xx/A, MLW92xx/A
Tech Specs: MacBook Pro (15-inch, 2016)
MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,2
Part Numbers: MLH12xx/A, MLVP2xx/A, MNQF2xx/A, MNQG2xx/A, MPDK2xx/A, MPDL2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,2
Part Numbers: MLH12xx/A, MLVP2xx/A, MNQF2xx/A, MNQG2xx/A, MPDK2xx/A, MPDL2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,1
Part Numbers: MLL42xx/A, MLUQ2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,1
Part Numbers: MLL42xx/A, MLUQ2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
2015
MacBook Pro (Retina, 15-inch, Mid 2015)
Model Identifier: MacBookPro11,4
Part Number: MJLQ2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2015)
Model Identifier: MacBookPro11,4
Part Number: MJLQ2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2015)
MacBook Pro (Retina, 15-inch, Mid 2015)
Model Identifier: MacBookPro11,5
Part Numbers: MJLT2xx/A, MJLU2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2015)
Model Identifier: MacBookPro11,5
Part Numbers: MJLT2xx/A, MJLU2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2015)
MacBook Pro (Retina, 13-inch, Early 2015)
Model Identifier: MacBookPro12,1
Part Numbers: MF839xx/A, MF840xx/A, MF841xx/A, MF843xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2015)
Model Identifier: MacBookPro12,1
Part Numbers: MF839xx/A, MF840xx/A, MF841xx/A, MF843xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2015)
2014
MacBook Pro (Retina, 15-inch, Mid 2014)
Model Identifier: MacBookPro11,2
Part Number: MGXA2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2014)
Model Identifier: MacBookPro11,2
Part Number: MGXA2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2014)
MacBook Pro (Retina, 15-inch, Mid 2014)
Model Identifier: MacBookPro11,3
Part Number: MGXC2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2014)
Model Identifier: MacBookPro11,3
Part Number: MGXC2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2014)
MacBook Pro (Retina, 13-inch, Mid 2014)
Model Identifier: MacBookPro11,1
Part Numbers: MGX72xx/A, MGX82xx/A, MGX92xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Mid 2014)
Model Identifier: MacBookPro11,1
Part Numbers: MGX72xx/A, MGX82xx/A, MGX92xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Mid 2014)
2013
MacBook Pro (Retina, 15-inch, Late 2013)
Model Identifier: MacBookPro11,2
Part Number: ME293xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Late 2013)
Model Identifier: MacBookPro11,2
Part Number: ME293xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Late 2013)
MacBook Pro (Retina, 15-inch, Late 2013)
Model Identifier: MacBookPro11,3
Part Number: ME294xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Late 2013)
Model Identifier: MacBookPro11,3
Part Number: ME294xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Late 2013)
MacBook Pro (Retina, 15-inch, Early 2013)
Model Identifier: MacBookPro10,1
Part Numbers: ME664xx/A, ME665xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Early 2013)
Model Identifier: MacBookPro10,1
Part Numbers: ME664xx/A, ME665xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Early 2013)
MacBook Pro (Retina, 13-inch, Late 2013)
Model Identifier: MacBookPro11,1
Part Numbers: ME864xx/A, ME865xx/A, ME866xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2013)
Model Identifier: MacBookPro11,1
Part Numbers: ME864xx/A, ME865xx/A, ME866xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2013)
MacBook Pro (Retina, 13-inch, Early 2013)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, ME662xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2013)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, ME662xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2013)
2012
MacBook Pro (Retina, 15-inch, Mid 2012)
Model Identifier: MacBookPro10,1
Part Numbers: MC975xx/A, MC976xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2012)
Model Identifier: MacBookPro10,1
Part Numbers: MC975xx/A, MC976xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2012)
MacBook Pro (15-inch, Mid 2012)
Model Identifier: MacBookPro9,1
Part Numbers: MD103xx/A, MD104xx/A
Tech Specs: MacBook Pro (15-inch, Mid 2012)
Model Identifier: MacBookPro9,1
Part Numbers: MD103xx/A, MD104xx/A
Tech Specs: MacBook Pro (15-inch, Mid 2012)
MacBook Pro (Retina, 13-inch, Late 2012)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, MD213xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2012)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, MD213xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2012)
MacBook Pro (13-inch, Mid 2012)
Model Identifier: MacBookPro9,2
Part Numbers: MD101xx/A, MD102xx/A
Tech Specs: MacBook Pro (13-inch, Mid 2012)
Model Identifier: MacBookPro9,2
Part Numbers: MD101xx/A, MD102xx/A
Tech Specs: MacBook Pro (13-inch, Mid 2012)
2011
MacBook Pro (17-inch, Late 2011)
Model Identifier: MacBookPro8,3
Part Number: MD311xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Late 2011)
Model Identifier: MacBookPro8,3
Part Number: MD311xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Late 2011)
MacBook Pro (17-inch, Early 2011)
Model Identifier: MacBookPro8,3
Part Number: MC725xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Early 2011)
Model Identifier: MacBookPro8,3
Part Number: MC725xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Early 2011)
MacBook Pro (15-inch, Late 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MD322xx/A, MD318xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Late 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MD322xx/A, MD318xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Late 2011)
MacBook Pro (15-inch, Early 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MC723xx/A, MC721xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Early 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MC723xx/A, MC721xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Early 2011)
MacBook Pro (13-inch, Late 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MD314xx/A, MD313xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Late 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MD314xx/A, MD313xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Late 2011)
![Rocksmith Rocksmith](/uploads/1/2/4/1/124107212/821313789.jpg)
MacBook Pro (13-inch, Early 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MC724xx/A, MC700xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Early 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MC724xx/A, MC700xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Early 2011)
2010
MacBook Pro (17-inch, Mid 2010)
Model Identifier: MacBookPro6,1
Part Number: MC024xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Mid 2010)
Model Identifier: MacBookPro6,1
Part Number: MC024xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Mid 2010)
MacBook Pro (15-inch, Mid 2010)
Model Identifier: MacBookPro6,2
Part Numbers: MC373xx/A, MC372xx/A, MC371xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Mid 2010)
Model Identifier: MacBookPro6,2
Part Numbers: MC373xx/A, MC372xx/A, MC371xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Mid 2010)
MacBook Pro (13-inch, Mid 2010)
Model Identifier: MacBookPro7,1
Part Numbers: MC375xx/A, MC374xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Mid 2010)
Model Identifier: MacBookPro7,1
Part Numbers: MC375xx/A, MC374xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Mid 2010)
2009
MacBook Pro (17-inch, Mid 2009)
Model Identifier: MacBookPro5,2
Part Number: MC226xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Mid 2009)
Model Identifier: MacBookPro5,2
Part Number: MC226xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Mid 2009)
MacBook Pro (17-inch, Early 2009)
Model Identifier: MacBookPro5,2
Part Number: MB604xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2009)
Model Identifier: MacBookPro5,2
Part Number: MB604xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2009)
MacBook Pro (15-inch, Mid 2009)
Model Identifier: MacBookPro5,3
Part Numbers: MB985xx/A, MB986xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Mid 2009)
Model Identifier: MacBookPro5,3
Part Numbers: MB985xx/A, MB986xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Mid 2009)
MacBook Pro (15-inch, 2.53GHz, Mid 2009)
Model Identifier: MacBookPro5,3
Part Number: MC118xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, 2.53GHz, Mid 2009)
Model Identifier: MacBookPro5,3
Part Number: MC118xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, 2.53GHz, Mid 2009)
MacBook Pro (13-inch, Mid 2009)
Model Identifier: MacBookPro5,5
Part Numbers: MB991xx/A, MB990xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (13-inch, Mid 2009)
Model Identifier: MacBookPro5,5
Part Numbers: MB991xx/A, MB990xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (13-inch, Mid 2009)
2008
MacBook Pro (15-inch, Late 2008)
Model Identifier: MacBookPro5,1
Part Number: MB470xx/A, MB471xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Late 2008)
Model Identifier: MacBookPro5,1
Part Number: MB470xx/A, MB471xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Late 2008)
MacBook Pro (17-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB166xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB166xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2008)
MacBook Pro (15-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB133xx/A, MB134xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB133xx/A, MB134xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Early 2008)
Learn more
You can connect an electric guitar or another electric instrument to your computer to play and record in an audio track, and use the included amps and pedals to shape your guitar sound. There are several ways to connect an electric instrument to your computer.
After you connect an electric guitar, you choose the input source for the track you want to record in, and optionally turn on monitoring. Monitoring lets you hear yourself play so that you can hear the part you want to record as well as the rest of the project.
Connect an electric guitar to your computer
![Rocksmith For Macbook Pro Rocksmith For Macbook Pro](/uploads/1/2/4/1/124107212/548664721.jpg)
Do one of the following:
- Connect an audio interface to your computer’s USB or FireWire port, then connect an electric guitar to the audio interface.
- Connect the electric guitar to a channel on the audio interface or the adapter cable, using a standard 1/4-inch tip-sleeve instrument cable.
- If your computer has an audio input port, connect an electric guitar to the audio input port using an adapter cable. Choose Built-in Input as the track’s input source.
If you connect an electric instrument to an audio interface, check the manufacturer’s specifications to make sure the interface is compatible with macOS and Core Audio. Follow the manufacturer’s instructions, which might include installing the correct driver on your computer.
Connecting an electric guitar to your computer’s audio input port may result in a low-level input signal. To increase the input signal, you can connect the guitar to a preamplifier, and connect the preamplifier to your computer.
Set the input source for an electric guitar
- Select the audio track.
- Click the Smart Controls button to open the Smart Controls pane.
- In the Recording Settings area, choose one of the following from the Input pop-up menu:
- If the guitar is connected to your computer’s audio input port, choose Built-in Input.If Built-in Input doesn’t appear in the menu, choose GarageBand > Preferences, click Audio/MIDI, and choose Built-in Input from the Audio Input pop-up menu.
- If the guitar is connected to a USB port, choose the microphone.
- If the guitar is connected to an audio interface, choose the channel number for the microphone.If the audio interface channels don’t appear in the menu, choose GarageBand > Preferences, click Audio/MIDI, then choose the audio interface from the Audio Input pop-up menu.
- Make sure the format matches the input. Choose a mono input for monophonic instruments (with a single channel), and choose a stereo input for stereo instruments (with a pair of channels). To change the input format, click the Format button to the left of the Input menu.
- Drag the Recording Level slider to change the input volume level for the sound source.If the Recording Level slider is dimmed, you can’t change the input volume in GarageBand. In this case, use the device’s own volume control.
Turn on monitoring for an electric guitar or bass
- In the Recording Settings area, click the Monitoring button .The Monitoring button lights orange to indicate that monitoring is turned on.
To avoid unwanted feedback, you should usually turn off monitoring when you’re not playing or singing. Using headphones rather than speakers to listen to your projects can also help eliminate feedback.