Is Mac OS X a UNIX-based OS?
129873
How Unix'y is Mac OS X?
113156
Why is the MacTeX distribution so large? Is there anything smaller for OS X?
107149
Is the current version of Ubuntu usable on a PPC mac?
78660
Whats the difference between Unix, Linux and Ubuntu?
97871
Java running as a Unix service
84170
Where does Mac OS X come from?
48539
How to run a shell script on a Unix console or Mac terminal?
68614
Is it possible to install an old version of Mac OS on a new Mac?
119174
MAC OS for Intel based PCs
60029
Which macs are compatible with OS X 10.11 El Capitan?
125086
Do GUIs represent a type of separate shell?
64364
Standard and/or common directories on Unix/Linux OSes
10799
What is different about the Mac ISO image?
85706
How to set my default shell on Mac?
81532
How Can I Search A Specific Type of File in Mac?
109751
Is there a Linux distro that's UNIX certified?
21264
Official way to obtain an OS X ISO file