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Cannot calibrate Retina iMac when booted from external Mojave drive
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2015 iMac currently running Mojave on the internal drive. The retina display looks great. But when I boot from an external ssd drive also running Mojave, I cannot get a good image on the retina display.

Tried calibrating with system preferences > displays > color > calibrate and also Spyder Pro color calibrator. Nothing seems to help. What caught my attention was the faint lines separating the days in Calendar and also the subtle gray/white backgroud lines here on the forum. When booted from the external, they're all washed out. Any ideas? TIA
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northern california coast
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Cannot calibrate Retina iMac when booted from external Mojave drive - by steve... - 04-29-2025, 03:16 AM

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