Trying to install imagemagick. when I run 'brew link imagemagick' I get this error: Error: Could not symlink lib/pkgco

Did you run brew doctor on the commandline?

I originally uninstalled imagemagick and then ran brew doctor and then reinstalled. This is what I get when I run brew doctor now:

Warning: /usr/local/lib/pkgconfig isn't writable.

This can happen if you "sudo make install" software that isn't managed by by Homebrew. If a formula tries to write a file to this directory, the install will fail during the link step.

You should probably chown /usr/local/lib/pkgconfig

Warning: Some directories in /usr/local/share/man aren't writable. This can happen if you "sudo make install" software that isn't managed by Homebrew. If a brew tries to add locale information to one of these directories, then the install will fail during the link step. You should probably chown them: /usr/local/share/man/man5 /usr/local/share/man/mann

Warning: Unbrewed dylibs were found in /usr/local/lib. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.

Unexpected dylibs: /usr/local/lib/libtcl8.6.dylib /usr/local/lib/libtk8.6.dylib

Warning: Unbrewed header files were found in /usr/local/include. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.

Unexpected header files: /usr/local/include/fakemysql.h /usr/local/include/fakepq.h /usr/local/include/fakesql.h /usr/local/include/itcl.h /usr/local/include/itcl2TclOO.h /usr/local/include/itclDecls.h /usr/local/include/itclInt.h /usr/local/include/itclIntDecls.h /usr/local/include/itclMigrate2TclCore.h /usr/local/include/itclTclIntStubsFcn.h /usr/local/include/mysqlStubs.h /usr/local/include/odbcStubs.h /usr/local/include/pqStubs.h /usr/local/include/tcl.h /usr/local/include/tclDecls.h /usr/local/include/tclOO.h /usr/local/include/tclOODecls.h /usr/local/include/tclPlatDecls.h /usr/local/include/tclThread.h /usr/local/include/tclTomMath.h /usr/local/include/tclTomMathDecls.h /usr/local/include/tdbc.h /usr/local/include/tdbcDecls.h /usr/local/include/tdbcInt.h /usr/local/include/tk.h /usr/local/include/tkDecls.h /usr/local/include/tkPlatDecls.h

Warning: Unbrewed .pc files were found in /usr/local/lib/pkgconfig. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.

Unexpected .pc files: /usr/local/lib/pkgconfig/tcl.pc /usr/local/lib/pkgconfig/tk.pc

Warning: Unbrewed static libraries were found in /usr/local/lib. If you didn't put them there on purpose they could cause problems when building Homebrew formulae, and may need to be deleted.

Unexpected static libraries: /usr/local/lib/libtclstub8.6.a /usr/local/lib/libtkstub8.6.a

Warning: You have unlinked kegs in your Cellar Leaving kegs unlinked can lead to build-trouble and cause brews that depend on those kegs to fail to run properly once built. Run brew link on these: freetype imagemagick libpng libtiff postgresql xz

Warning: Your Homebrew is outdated. You haven't updated for at least 24 hours. This is a long time in brewland! To update Homebrew, run brew update.