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Minitel46 Author

Level 1

8 points

No Bootable device ? Alt - option not work

Hello

I have a Pro retina late 2012 and turned under windows with bootcamp.

After a reboot I got the message more or less classic

No bootable device - insert boot disk and press any key

So I tried to press option nothing happens, starting with cmd + R, cmd + alt + R, Shift nothing works

I tried resetting NVRAM that does not work

I have at startup chime sound mac and then 30/40 seconds after the message

Only the SMC reset seems to work, but so far it does not change

I tried with an external keyboard does not change ca

It was controlled it not took water, the screen works even externally

I reinstalled mac osx from another without problem in usb but I ssd presents the same mistake in the retina.

Or that the intrigues me and that if I start the mac without ssd he does his mac and then the screen goes blank with the backlight turned on but it does not display the message

I do not know what to do anymore

I appeal to you to offer me solutions to test

thank you in advance

Posted on Oct 10, 2015 7:31 AM

48 replies

Loner T

Level 9

59,471 points

Oct 12, 2015 5:13 AM in response to Minitel46

The slowness could be due to many reasons.

What type of hard disk does the Mac have?

Is the mouse a wired mouse? Test with both wired and wireless mouse.

Run SMC Reset and NVRAM Reset and test.

Minitel46 Author

Level 1

8 points

Oct 12, 2015 5:35 AM in response to Loner T

I Oppened the monitor and i view that the processor is uses as 98% by the system permanently but no programme in the list seems to use it

SMC Reset seems to be the solution but when i boot smc reset nvram reset ALT option ... All not work the mac direct go to the apple logo to boot ans slowly

Loner T

Level 9

59,471 points

Oct 12, 2015 6:21 AM in response to Minitel46

Is this on the OS X side or Windows? After boot, you will see CPU usage go up, but it will come down once you have the initial applications up and running.

Minitel46 Author

Level 1

8 points

Oct 12, 2015 6:42 AM in response to Loner T

When tomorrow he booted on windows i got no problem, but when i booted on osx i get this laggy problem

Directly when i boot the apple loading logo is realy slow and when the mac if fully booted even after 20min is again and again slow

I tryed reinstall osx without problem but when i reboot again the procesor is used a it max 😟

Minitel46 Author

Level 1

8 points

Oct 12, 2015 6:44 AM in response to Minitel46

The NVRAM ALT-OPTION CMD + R function not work and the process is fulled used

It's like if an apple software for gestion was forgetten do you think it could be ?

Loner T

Level 9

59,471 points

Oct 12, 2015 7:32 AM in response to Minitel46

Run a SMC Reset and test Command+R and NVRAM reset.

Minitel46 Author

Level 1

8 points

Oct 12, 2015 7:43 AM in response to Loner T

Nothing work on boot SMC NVRAM or CMD + R ..

Loner T

Level 9

59,471 points

Oct 12, 2015 7:50 AM in response to Minitel46

1. Can you check if your Mac's serial number is valid?

2. Was the logic board replaced on this Mac at any time?

Minitel46 Author

Level 1

8 points

Oct 12, 2015 8:14 AM in response to Loner T

I checked this is original board

I gad news i disconected the keyboard from the board and put an usb keyboard and by rebooting the NVRAM worked

How to do the smc reset it's the aluminium usb applekeyboard and not have the ON OFF button :/

Loner T

Level 9

59,471 points

Oct 12, 2015 8:18 AM in response to Minitel46

The ON/OFF button is on the main Mac. If that does not work, you can try

Shut down the computer.
Disconnect the MagSafe power adapter from the computer if it's connected.
Remove the battery. (just disconnect the battery from the logic board in your case).
Press and hold the power button for five seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.

Minitel46 Author

Level 1

8 points

Oct 12, 2015 8:21 AM in response to Loner T

When i press alt with the usb keyboard on boot starting manager work ... (y)

From the bigining it's seems to be the keyboard who not work propely

I will try this and tell you if it work

Minitel46 Author

Level 1

8 points

Oct 12, 2015 12:12 PM in response to Loner T

Okay so i view now in the activity monitor the laggy is from the Kernel_task who panic highter than 300% cpu usage

But how to stop this pannic, the smc reset buy removing the battery no seems to work, i try deleting .plist file but it's not possible and formy 10,2 mac is not present