If your Mac is using a firmware password, this combination causes your Mac to start up from macOS. Option-Command (⌘)-P-R Reset NVRAM (or PRAM). macOS Recovery installs different versions of macOS, depending on the key combination you use while starting up. Or use Option-Command-R or Shift- Option-Command-R to start up from macOS Recovery over the Internet. Command-R Start up from the built-in macOS Recovery system. iMac Pro doesn't support this startup key. To use the default boot image on the NetBoot server, hold down Option-N instead. N Start up from a compatible NetBoot server, if available. Or use Option-D to start up from this utility over the Internet. D Start up from the built-in Apple Hardware Test or Apple Diagnostics utility, depending on your Mac model. If your Mac is using a firmware password, you're asked to enter the password first. Option (⌥) Start up to Startup Manager, which allows you to choose other startup disks, if available. Hold during startup Shift (⇧) Start up in safe mode. First create a backup of your gps with windows explorer using the procedures in this link.This is important in protecting your map data which if you lose you may have to. if this does not work this is a link to a document which shows how to calibrate the tomtom screen for a certain model. Use a can of air (as used for cleaning photographic lenses) with a fine nozzle attached. Better yet, blast air under the bezel as you lift it. A few grains of sand / grit is enough to screw up your screen sensitivity. This guide also includes steps to upgrade your iMacs hard drive. Work the brush bristles gradually right around the screen and note what drops out on a clean sheet of paper. Replacing the hard drive requires separating the display and removing the left speaker. Although later i noticed you could wedge the sharp edge of a knife between the glass and the case and widen the gap with a fingernail, then pull the glass out completely.Ī note when you're buying screw drivers.Before you all go fiddling with complicated calibration settings, try this simple solution with an old toothbrush: Use a card or fingernail to slightly lift the screen bezel around the touch screen, only needs to be just enough to get a few toothbrush bristles under it.
Also used duct tape on edges of the container to create more friction and not damage the glass. Instead of buying suction cups, i used a vacuum cleaner inserted into the back of a plastic container to create more pressure per inch. I'm not here to rant though, i've some useful tips as well. Then randomly the installation fails and asks to try again. The installation starts and goes on for a while, while the hard drive makes a weird clicking noise. The problem i'm stuck with now is installing os x again. My hd failed and i used this guide to replace it with the same model.
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