Visit the source links for the how-to's.
- WiFi issue: "Your network works fine for a while, typically between about 30 seconds and five minutes, and then fairly abruptly begins to suffer almost total traffic loss."
The fix: Try resetting the SMC (has worked on iMacs and MacBook Airs)
Source: MacDaily News - 2014/10/22 - Booting into Safe Mode: "After upgrading to OS X Yosemite, you might encounter a problem where your Mac appears to always boot in Safe Mode,..."
The fix involves one or more of the below:
1) Reset the PRAM
2) Fix your Hard Drive
3) Format your Hard Drive
Source: MacIssues - 2014/10/20 - Apple Mail Crashing: "After upgrading to OS X Yosemite, you might find Apple's Mail application may crash or hang when you open it, preventing you from accessing any new messages."
The fix: involves one or more of the below
1) Launch Mail in Safe Mode
2) Boot your Mac into Safe Mode to launch Mail
3) Remove Mail saved state
4) Temporarily disable Mail accounts
5) Uninstall or disable any 3rd party Mail add-ons
6) Remove and rebuild Mail's container
Source: MacIssues - 2014/10/19 (updated 2014/10/20)
(As an aside - it seems that Outlook 2011 seems to work perfectly)
- Juniper VPN issues: Network Connect hangs, Junos Pulse won't work.
The fix: Seems to be to use newer version of Network Connect instead of Junos Pulse -- see last Forum entry in the source link.
The Source: MacRumors Forum - entry #17 dated 2014/10/22 - DNS issues: Trouble accessing .local domain
The fix: open a Terminal session and run this command: sudo discoveryutil mdnsactivedirectory yes
Source: Apple Support Communities (entry by Kenneth Barnt on 2014/10/23)