Different Boot Screen

[Retromac2008]

Why old mac are still with the White bootscreen?

all the new macs have black boot and loading scree with white apple

(on iphones and ipads loading screen match the phone s color)

 

[Fishrrman]

Probably because some interface designer at Apple decided it would "look cooler" at bootup.

That simple...

 

[Retromac2008]

Probably because some interface designer at Apple decided it would "look cooler" at bootup.

That simple...

but most old macs have black bezels too (2008+)

 

[DeltaMac]

Apple just did not apply firmware updates to make the older Macs boot with the black screen.
And, older OS X versions still boot in the same way.
If I boot my mini from Yosemite and newer, it's a black boot screen.
If I boot the same Mac from Mountain Lion, then it has the old, white boot process.

Why is that different? Apple simply never changed it.

 

[Retromac2008]

Apple just did not apply firmware updates to make the older Macs boot with the black screen.
And, older OS X versions still boot in the same way.
If I boot my mini from Yosemite and newer, it's a black boot screen.
If I boot the same Mac from Mountain Lion, then it has the old, white boot process.

Why is that different? Apple simply never changed it.

high sierra on my old macs (2011 2012) --> it s the old white screen

 

[DeltaMac]

Could it be that you are running High Sierra from a drive that was not connected to one of your old Macs for the original install?
What I mean is, maybe you installed High Sierra on that drive, while it was attached to a different (newer) Mac.
The firmware gets checked (and updated) on the computer that is used for the install. If you then move that drive (with the High Sierra already installed) to a different Mac, THAT Mac does not have the firmware update, hence would still show the white screen.

What are the specific models do you have that are 2011 and 2012 Macs (What shows in About This Mac?)
For example, I have a 2012 Mac mini, which certainly shows the black boot screen on recent macOS boot (either El Capitan, or High Sierra), but continues to show the white boot screen when I boot into Mountain Lion.
Maybe there is just not a firmware update that makes that change to the boot screen, depending on the actual model Mac that you own.
If you only "moved" an already installed drive, and are booting to that drive from a different Mac, you could simply try reinstalling High Sierra while that drive is connected to your older Mac. That might be the difference.

 

[Retromac2008]

Could it be that you are running High Sierra from a drive that was not connected to one of your old Macs for the original install?
What I mean is, maybe you installed High Sierra on that drive, while it was attached to a different (newer) Mac.
The firmware gets checked (and updated) on the computer that is used for the install. If you then move that drive (with the High Sierra already installed) to a different Mac, THAT Mac does not have the firmware update, hence would still show the white screen.

What are the specific models do you have that are 2011 and 2012 Macs (What shows in About This Mac?)
For example, I have a 2012 Mac mini, which certainly shows the black boot screen on recent macOS boot (either El Capitan, or High Sierra), but continues to show the white boot screen when I boot into Mountain Lion.
Maybe there is just not a firmware update that makes that change to the boot screen, depending on the actual model Mac that you own.
If you only "moved" an already installed drive, and are booting to that drive from a different Mac, you could simply try reinstalling High Sierra while that drive is connected to your older Mac. That might be the difference.

thank you for the answer
It s a 2012 Imac (gtx 680mx) and a 2011 Macbook Air (Intel hd 3000). i just updated my os from the app store, never swapped drives or opened the case (i m unable to open an imac, it s really hard )

 

[DeltaMac]

Ah, OK.
Maybe there is a difference with the firmware because of the method that you used for the install. Perhaps that does not get updated/installed, unless you are booted to the macOS installer.
I would suggest reinstalling HS from a bootable drive.
Not sure if the MBAir would get the black boot screen, But I'm pretty sure the Late 2012 iMac should (not completely sure, as I don't have one), as it did come with Mountain Lion originally, which (I am guessing) should be new enough for the black screen support. I could be incorrect on that.

But then, in the event it is not supported, then you don't get the black boot screen. My mini, a Late 2012 model, certainly does. I just can't verify that a Late 2012 iMac supports the black screen. One way to find out. Boot up to the installer (good time to make a bootable USB for HS, if you don't already have one), and reinstall. It will simply load the system again, and won't affect your own files. And, it SHOULD recheck your firmware version, and automatically update it if it is not latest firmware. Should be worth a try, particularly on the iMac.

 

[Retromac2008]

Ah, OK.
Maybe there is a difference with the firmware because of the method that you used for the install. Perhaps that does not get updated/installed, unless you are booted to the macOS installer.
I would suggest reinstalling HS from a bootable drive.
Not sure if the MBAir would get the black boot screen, But I'm pretty sure the Late 2012 iMac should (not completely sure, as I don't have one), as it did come with Mountain Lion originally, which (I am guessing) should be new enough for the black screen support. I could be incorrect on that.

But then, in the event it is not supported, then you don't get the black boot screen. My mini, a Late 2012 model, certainly does. I just can't verify that a Late 2012 iMac supports the black screen. One way to find out. Boot up to the installer (good time to make a bootable USB for HS, if you don't already have one), and reinstall. It will simply load the system again, and won't affect your own files. And, it SHOULD recheck your firmware version, and automatically update it if it is not latest firmware. Should be worth a try, particularly on the iMac.

thank you again
I m going to check it right now