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Tech tool pro boot disk mac lion mac os x#
Tech tool pro boot disk mac lion update#
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Tech tool pro boot disk mac lion update#

OK, I now see from here that the long tone from step 10 means that an EFI update is in progress, but even if I leave the computer on for a long time, the update does not appear complete. Please note that I clarified the steps I took for firmware repairs in step 10. This is when I started having issues with booting into my iMac, but even removing rEFIt and re-initializing my internal hard drive has not resolved the issue.ĭoes anyone have any suggestions? Is there anything else I can do to fix my iMac? TIA. Then a few days ago I decided to try reinstalling rEFIt (I should have probably used rEFInd instead, but rEFIt had worked previously for me, so that is why I had tried to use it again).

Tech tool pro boot disk mac lion mac os x#

At some time later I removed rEFIt and installed Mac OS X Mavericks, which worked without a problem. At that time I think I had Mac OS X Lion installed. I put the firmware restoration CD into my DVD, but the screen remains blank.Ī year or two ago I had installed rEFIt on my Mac and had it successfully booting to various devices. I don't see the 3 quick blinks followed by 3 slow blinks then 3 quick blinks of any LED or tones, but instead hear one long tone and the computer starts up.

Boot into Apple Firmware Restoration CD 1.3 by holding the power button for a long time according to this link.

The hard drive re-initializes OK but it doesn't change anything else, so it appears to be a firmware issue.

Taking out the hard drive and re-initializing it on my older eMac with Mac OS X Panther.

Tech tool pro boot disk mac lion pro#

Boot using Tech Tool Pro DVD by holding C.

Boot using Disk Warrior 4.4 DVD by holding C.

Hold until system reboots at least three times, but after rebooting again the screen remains blank.

Reset parameter RAM by holding option - Command - P - R.

Boot into single user mode by holding Command - S.

Attempt to choose boot device by holding option.

Boot into safe mode test by holding shift.

Boot using the Mac OS X Lion DVD by holding C.

I think there is a problem with the firmware, because because here are steps I have taken to attempt to resolve the issue, which have not appeared to work: After rebooting it just displays a blank grey screen with no apple. That way I can troubleshoot and (hopefully) repair any Mac I own.Recently, I attempted to re-install Mac OS X Lion on my 2007 iMac computer (EMC 2133), but during the installation process it got interrupted. When I create such a clone I ensure that it’s compatible with all the Macs in my home. Should the Bad Thing happen, I can attach that drive, boot from it, and attempt to repair my Mac with the tools I’ve installed on that drive. It’s for these reasons that I have a clone of my Mac’s startup drive waiting in the wings.

And when disaster really strikes, it’s more than just a bit handy to have a drive you can boot your Mac from and carry on with your work. Tool 5: A clone Shuffling repair CDs in and out of your Mac is no fun-and impossible if your Mac lacks a media drive as do the new Mac mini and all MacBook Airs. It’s a good all-around tool and it too is Lion compatible. It duplicates some of the functionality of Disk Warrior and Data Rescue 3, but it also includes hardware diagnostic tools not found in the other packages.

Micromat’s $100 TechTool Pro 6 is also worth having.