Shut down the computer and then power it back up after waiting 10 seconds. Disconnect all peripherals except those needed for the test. Try booting into the Safe Mode using your normal account. Isolating an issue by using another user account The intent is to see if it is specific to one account or a system wide problem. If Back-to-My Mac is selected in System Preferences, the Guest account will not work. Try setting up another admin user account to see if the same problem continues.

I am so looking forward to any possible solutions to my problems and I thank for your help in advance,ĭo a backup, using either Time Machine or a cloning program, to ensure files/data can be recovered. I guess Mavericks might be not the reason causing my problems, since I already had this trouble while using Snow Leopard since the beginning of 2014. When the problem shows up, quite often I cannot watch the video or the Video is lag on the youtube by using Safari (I cannot use Chrome). I have a feeling that this problem has something to do with crashed Java. I have tried to completely reinstall the OS, i.e., format the disk, install Snow Leopard and then upgrade to Mavericks, but the problem still shows up, roughly twice a month. I am not sure how exactly to solve this problem, but it seems that if I shut down the MBP for one night, everything will be just as normal in the next day's morning.

Once this situation shows up, it will not be solved by rebooting the computer immediately.

Recently, it happened that Google Chrome, Parallels Desktop, and VLC (DVD player) are unable to start. I have a MBP 2010 Mid (2.4 GHz i5 with 8 GB 1067 MHz DDR3 memory and a 750 GB HD) and the OS is upgraded to 10.9.5.

Parallels desktop for mac 10.9.5