Can my iMac play back mp3 or mp4 audio?

I would like to know if I can play mp3 or mp4 audio files on my iMac with OS X Yosemite. iI is a 27" 3.2 GHz with an Intel Core i5 and 8 gig memory. I am interested in an audio bible study in that format. I appreciate any help I can get.
Thank you,
Lee W.

Of course. Mp3 is universal standard. Mp4 is a standard based on Apple audio/video specs
Pretty much any Mac can play either format natively.
The included Quicktime player should be able to handle the formats without any issues.

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Can you post back with the following.
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DP-K
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This post is the end of a weeks long hair pulling, to save other people the pain of my past week, here is a quick rundown of the issue and the solution that for us at least worked.
All the software is legit and fully updated btw, before people ask.
Logic Pro 9.1.7 on 2010 Imac on 10.6.x, Refx Nexus, Sylenth plus many other VST's and Au's, Mackie Pro + Extender, 2 Midi Keyboards (Oxygen 49 and Alexis 49) and with a M-Audio 410 external soundcard running 10.1.3 driver, all working.. only issue we had was when copying midi between tracks into differing plugins the midi would corrupt the plugin requiring a restart of Logic.
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Graid is 800, M-Audio is 400.. Connected as Imac -> GRaid -> Maudio
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Copied over a whopping 550GB off Imac onto external.. then later on, rebooted mac and started working on music.
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Rebooted mac
Started using Logic again, not 1 minute in, External drive and M-Audio disconnected themselves from the Mac.
Rebooted
Hard drive now seen, no M-Audio.
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M-Audio now seen, sound quality dreadful, shutdown Mac, rebooted without M-Audio, sound still awful just on Internal audio.
Time passes, I smoke too much, prod and poke and eventually reach for the install media
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Removed M-Audio driver
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All BAD; sound was terrible,
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Playing any Mp3 via internal Audio, terrible..
Whatever happened, has thrown the entire Audio system into a mess, again!.
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Reinstalled M-Audio Driver
All good, on internal or external Audio
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Reconnected M-Audio
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When the M-Audio (400FW) is connected to Mac via External Drive (800) the Audio is knackered from that point onwards on 10.7.4, removing M-Audio drivers and re-installing makes no difference, even the Internal Sound is knackered.
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When the M-Audio is daisychained the Mac changes a setting somewhere, probably to adjust for high latency, at this point it is written somewhere (either as a file or as DSP bios setting) that is not being reset.
This is why it is completely broken until 10.7.4 is re-installed at which point whatever setting it is that was changed, is reset.
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