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OS X updates have been virtually flawless for me in the past. Yosemite is the first one with big problems: - No longer able to connect to any 5GHz wifi routers

OS X updates have been virtually flawless for me in the past. Yosemite is the first one with big problems: - No longer able to connect to any 5GHz wifi routers. - Wifi drops suddenly and won't reconnect automatically even though the network is present. - Very slow wifi generally. - Unable to restore from sleep, machine reboots. - External display doesn't come up during login after sleep, need to open MacBook and login there. - Random hangs/kernel panics. (Could be explained by faulty RAM, but starting to happen just after Yosemite upgrade? Doubt it.) - Laggy UI. The last point is the worst. "Reduce transparency" does nothing for me. WindowServer is occasionally using 20-30% when the system is doing almost no redrawing. Safari is sluggish, and often hangs for several seconds — especially on opening new blank tabs, loading a new site, trying to load an embedded YouTube video ("HTML5" mode) — before becoming responsive again. Overall, it feels like my machine (early 2013 MBP, quad-core 2.7GHz i7, 16GB, SSD) just rolled back two hardware generations. Hopefully this update should fix the wifi issues. But the lagginess isn't mentioned in the release notes. Has anyone gotten any performance improvements by reinstalling the OS from scratch?

geekam 12y ago
I have faced WiFi issues on my iPhone and iPad for sure. These comments like yours are doing to make me stay with Mavericks for a while. :-/
pjmlp 12y ago
Somehow I would expect something else from premium brands.
FireBeyond 12y ago
- Random hangs/kernel panics. (Could be explained by faulty RAM, but starting to happen just after Yosemite upgrade? Doubt it.) Yup. Early 2013 15" rMBP, on Mavericks? Rock solid. Even on a fairly minimal clean install of Yosemite? Hard freezes, kernel panics. iMac will occasionally come back from sleep with a all white screen except for my user logo. I can type (though can't see) my password and login, but the quality has gone horribly downhill.
lobster_johnson 12y ago
Forgot these: - Random graphics glitches, especially in Safari. Random garbage/empty areas being painted. - FileVault's encryption process doesn't finish. "Connect power adapter to resume encryption". It is connected. Has been doing this since I upgraded. - If you enable "Reduced transparency", you get certain graphics artifacts. For example, the rounded corners on screen overlays such as the brightness and volume settings are painted in.

geekam 12y ago

I have faced WiFi issues on my iPhone and iPad for sure. These comments like yours are doing to make me stay with Mavericks for a while. :-/

pjmlp 12y ago

Somehow I would expect something else from premium brands.

FireBeyond 12y ago

- Random hangs/kernel panics. (Could be explained by faulty RAM, but starting to happen just after Yosemite upgrade? Doubt it.) Yup. Early 2013 15" rMBP, on Mavericks? Rock solid. Even on a fairly minimal clean install of Yosemite? Hard freezes, kernel panics. iMac will occasionally come back from sleep with a all white screen except for my user logo. I can type (though can't see) my password and login, but the quality has gone horribly downhill.

lobster_johnson 12y ago

Forgot these: - Random graphics glitches, especially in Safari. Random garbage/empty areas being painted. - FileVault's encryption process doesn't finish. "Connect power adapter to resume encryption". It is connected. Has been doing this since I upgraded. - If you enable "Reduced transparency", you get certain graphics artifacts. For example, the rounded corners on screen overlays such as the brightness and volume settings are painted in.