@BreBo. Thanks for pointing to Thij's guide. I learned from it that the problem resided in an installer folder in a drive partition, rather than in the NVRAM. After much fumbling I found the culprit folder -- .IABootFiles -- in the partition containing the installer app. The now unbloated...
hi kiiroaka, I've created a similar problem in my Mac Pro 5,1's NVRAM. A boot option called "OSX Installer", taking up scarce screen space, appears ever since an aborted install. Mac OSX terminal allows command nvram -p to view NVRAM contents. But it seems incomplete. Clearing NVRAM, say...
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