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Q: OSX 10.11.1: Problem with External HD Drives (not recognised at all or only in read only mode)

Hi, i have an iMac (21.5-inch, Late 2009), and i have installed recently the OSX 10.11.1.

After the installation whenever i try to connect an external hard disk either it is not recognised at all or i can access it only in read only mode.

Prior to the installation of the 10.11.1 version i did not encounter such a problem with the external disks i use.


The 2 external hard disks i currently use are: Seagate HD 1TB (Model: SRD00F1, S/N NA75JZ3L) & Toshiba 2TB (S/N 15MCTZWYTYP3).

I already checked and in Finder preferences menu the "external disks" option is selected.


I would appreciate if you can give me a hint ignorer to correct this problem.


Thank you in advance

iMac, Mac OS X (10.7.1)

Posted on Oct 25, 2015 7:08 AM

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Q: OSX 10.11.1: Problem with External HD Drives (not recognised at all or only in read only mode)

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