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Mike, Mac Medic
Category: Mac
Satisfied Customers: 8527
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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How to I end an installation while computer is launching? Is

Customer Question

How to I end an installation while computer is launching? Is their an automatic key to press to stop the installation immediately?
JA: Just to clarify, what's the make and model of your machine, and what operating system are you running?
Customer: iMac 10.03 (I think)
JA: Have you installed any updates recently?
Customer: Yes, that's the problem. Composer is supposedly upgrading Yosemite to Sierra
JA: Anything else you want the computer expert to know before I connect you?
Customer: Fortunately I'm using my other oder iMac positioned beside my other computer that's been in the "lunch" mode for the past half hour.
Submitted: 3 months ago.
Category: Mac
Expert:  Richard replied 3 months ago.

Hi there and welcome

Can you tell me please exactly what you are seeing on the screen of the problem mac now?

Thank you