Q: Funs mac book pro retina 15

With the Intel-based CoreDuo and later hardware the fans appear to be on

to circulate airflow, at a minimum all the time, and increase with activity of

the processor and graphics use.

• Mac notebooks: Operating temperature - Apple Support

My first edition 2006 MacBook1.1 (13-inch 1.83GHz coreduo) fans run at

low speed all the time. In a more recent desktop Late 2012 Mini, fans run

all the time, usually at idle with no apps running, about 1500 ~ 1700RPM.

From initial start up, both of these Intel models (+others appear to) do this.

The Activity Monitor can tell a few details; also a temp monitor app helps.

[A few of the newest model Apple portables (2014-15) have no fan at all.]

Be sure the vents are not obscured, and at some point, if dusty conditions

are a usual working environment, consider a service visit to de-dust inside.

Not sure your question has explicitly been answered...

Good luck!

Well, actually the fans aren't the only item to be concerned with should

you consider starting the MacBook Pro Retina or any other Mac when

the ambient temperatures are 0° C (or +32°F) as the operational temps

are published and suggest a more balmy warmth. Not only for the sake of

conversation; to avoid damages by condensation of internal components.

• Mac notebooks: Operating temperature - Apple Support

The location you are using your notebook should be within these ranges:

• Operating temperature: 50° to 95° F (10° to 35° C)
• Relative humidity: 0% to 90% non-condensing

When transporting between temperature and humidity extremes as present

the product should be allowed to warm to the warmer temperature environs

slowly and if colder, avoid humid air contact with the device...

Electronics of most any kind requires advance protection and care.

(I've used plastic to keep camera gear from direct air contact on returning

from hours away from heat, to avoid condensation; but in very cold temps

the item cannot sit in a padded case and be expected to warm up quick.

Sleepy electronics may need other accommodation to not get steamy.)

Anyway, I thought about Zero °C -- & had to return + comment...!

Well, with a multi-core processor even when low power design, the fans (where they exist)

will run at a slower speed at idle than later when there are varying loads due to processor

and or graphic activities.

My quad-core i7 Mini cooling fan quietly runs between 1500 and 1700 RPM. Certain portable

models have two fans; one may be dedicated to specific sections within the computer...

This is normal. A concern may be, if the sensors which control the fans were to themselves fail

then the fans in many models run at near full speed all the time. In models where the user or

an unqualified repair shop can install incorrect replacement or upgrade parts that do not have

the correct connection nor do they have the sensor for the fan to operate correctly, this can

result in the necessity of corrective action; some users would then need to consider either a

hardware (correct replacement) or lacking that option, a software (fan control) fix to cure it.

So as it sits, there is no reason to suspect the fans running as they do, to be problematic.

However if the computer is used in a dusty environment, it may inhale dust and then be

less able to cool at some point in time when the fans or circulation vents get choked; so

you may wish to ask an Apple Store genius (best with appointment) to check into clearing

dust accumulations once or twice a year. Especially once you start using the computer and

the processor cores start producing some heat; if you run intense applications or video

content, or some games, or combination of these, the fans will spin & CPU will get hot.

Be sure to keep the metal of the computer body on a firm surface and not cloth; even to have

it elevated above the desktop so air can circulate all around it, should help it run cooler. The

need to keep it cool when under a load is apparent or somewhat obvious; more so in summer

or if you have a heat source nearby in winter that may create an ambient or localized hot zone

which could make the computer work harder to stay cool. You should be able to test the fans

ability to run fast enough to hear; if you have a temperature application to see the fan speeds

and the internal temperature of internal components, then you can tell if the baseline changes.

Efforts to learn how to keep it cool, especially in warmer weather, are worth looking into...

The newer MacBook 12-inch Retina has no cooling fans; some other models also are fan-less.

If the cooling fan starts making odd noises, it may need cleaning; these aren't very accessible

and newer models have no user-accessible parts inside. Learn the noises it makes normally

with or without a load; then someday in a few years or so, you could notice a different noise

if the fans start to wear out. They can be swapped out in a service visit, if they know ahead of

time what the problem may be. An Apple Store with genius is good for basic tests & inspection.

Anyway, I've been up for more than 22 hours; but not all of it online...

I don't think my volunteer participation that long would be worth it. LOL