i downloaded osx yosemite onto my macbook air and now my wifi is down after it being fixed for a day, my computer is very laggy, the keyboard is disconnecting and I can't find a way to stop It. And i cant even download the update because App Store is not loading. If there are any suggestions to these problems I would be glad to hear them.
Regards. Me
MacBook Air, OS X Yosemite (10.10)
Restore the bootable backup/clone or Time Machine backup of your previously good OS.
27" i7 iMac (Mid 2011) refurb, OS X Yo (10.10), Mavs, ML & SL, G4 450 MP w/10.5 & 9.2.2
Activity Monitor - Mavericks also Yosemite
Activity Monitor in Mavericks has significant changes
Why your Mac runs slower than it should
Things you can do to resolve slowdowns see post by Kappy
Try running this program and then copy and paste the output in a reply. The program was created by Etresoft, a frequent contributor. Please use copy and paste as screen shots can be hard to read.
Etrecheck – System Information
Wi-Fi: How to troubleshoot Wi-Fi connectivity
Wi-Fi Problems in OS X Yosemite
Also try turning off Bluetooth.
First thing to do is check out CONSOLE.
Usually if you are "lag" it means console is pretty busy.
I found that a number of my previous "widget" / additional apps no longer work under Yosemite.
- Diary program Chronories for example, was just filling screeds of console pages with alerts and warnings.
- Chronories makers state
Apple implemented some major modifications to the way applications are allowed to interact or access data from different applications. Unfortunately, Chronories is one of the applications that are severely affected by these decisions. While technologies like "Sandboxing" improve the general security of the whole system, several applications can no longer be maintained as before. Even updates to the existing app are nearly impossible because Sandboxing is required for any further update. This is we had to stop selling Chronories... although we really liked it a lot."
Sure enough I removed everything to do with Chronories and ... lag decreased... only a few more Apps to go.
In this case a real shame as I liked using Chronories.
They can recompile it to work in Mavericks and Yosemite, but to that, they would have to make it an universal app and bypass the sandboxing issues which they couldn't sell via the MAS. Carbon Copy Cloner and others do that.
Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.
Note: If FileVault is enabled in OS X 10.9 or earlier, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.
The login screen appears even if you usually login automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of the test.
Hugely frustrating problems on Mac post osx yosemite
