mac bloqueado

Hola, desde que he instalado avast en mi mac, me sale la pantalla gris con el simbolo de apple y un engranaje y no consigo arrancar el ordenador.
cmo consigo desintalar avast, porque me está creando conflicto en el arranque.
ayuda por favor.
gracias

Trata de arrancar en modo seguro: Mientras la máquina está arrancando, haga clic en la tecla “Shift” hasta que aparezca el signo de manzana (logo), luego suelte el botón. Una vez que la máquina se arranca, vaya a Safari. Entonces ve a Preferencias → Extensiones → seleccionar el Avast Plug-in → Desinstalar. Reboot.

¿Tiene cualquier otro antivirus en este equipo o que hiciste en el pasado? Si lo hace, o no desinstaló correctamente, esto podría causar conflictos. ¿Tiene otro software de seguridad en su equipo?

Háganos saber si usted tiene algún problema. Gracias.

[i]Translation: Try booting in Safe Mode: While the machine is booting, click the “Shift” key until the apple sign (logo), then release the button. Once the machine is started, go to Safari. Then go to Preferences → Extensions → select the Avast Plug-in → Uninstall. Reboot.

Do you have any other antivirus on this computer or did in the past? If you do, or did not uninstall correctly, this could cause conflicts. Do you have other security software on your computer?

Let us know if you have any problems. Thank you.[/i]

I will provide instructions on how to actually uninstall Avast for Mac in my next post, feel free to translate them to Spanish.

To uninstall Avast! for Mac in Safe mode (press shift during booting), open Avast! app after login in and from the top menu: avast! > Uninstall avast!

If you had a different AV before Avast! be sure to completely uninstall it (refer to the vendor’s documentation).

gracias por su respuesta.
mañana intentare hacer lo que me dices y le cuento.
una vez mas, muchas gracias

No puedo arrancar el mac y no puedo acceder a la desinstalacion de Avast.
gracias

I cannot write in Spanish by I understood what you wrote in your first post perfectly, can you understand English? I can try to google translate my posts, if that helps.

I provided instructions on how to remove the program in my second post, did that work?

The only difference between my instructions and Safesurf’s is that I actually tell you how to uninstall the application, Safesurf’s tells you how to uninstall the safari extension which will not solve your problem. As for not being able to boot, that’s why we say that you should boot in to safe mode (holding shift key).

gracias.
cuando arranco con shift, sale debajo del icono de la manzana una barra de carga, cuando llega a la mitad se para y se quita , se queda el engranaje girando sigue igual no avanza.

I suggest you try booting into single user mode (command + s when starting the mac).

To uninstall avast type the following command exactly as it appears below, no line breaks:

sudo sh /Library/Application\ Support/Avast/components/uninstall/com.avast.uninstall.app/Contents/MacOS/uninstall.sh

Press enter.

It will ask for your password, provide it.

Let it run, then type “reboot” followed by enter.

If this doesn’t work, if even after avast uninstall the mac doesn’t boot, I suggest this article:
http://support.apple.com/kb/TS2570

The same apple article in spanish: http://support.apple.com/kb/TS2570?viewlocale=es_ES&locale=en_US