Start Up Discs

[Guzaking]

I'm trying to start my Mac in Start Up Manager but no matter how many times I hold down the Option key during start up it just won't go into the Start Up Manager and reverts to a partition that i don't want to start up in.

I went into System Preferences and to Startup Disk chose my 2nd partition to try to get into then hit the restart button and I get a pop up window responses of "You can't change the startup disk to the selected disk. The bless tool was unable to set the current boot disk."

What is a "bless tool" how can I get this to accept the partition change? I hope its not complicated, any suggestions?

 

[Bruno09]

Hi,

what are the OSes on the two partitions ?

I would first reset the NVRAM : https://support.apple.com/en-us/HT204063

 

[Taz Mangus]

I'm trying to start my Mac in Start Up Manager but no matter how many times I hold down the Option key during start up it just won't go into the Start Up Manager and reverts to a partition that i don't want to start up in.

I went into System Preferences and to Startup Disk chose my 2nd partition to try to get into then hit the restart button and I get a pop up window responses of "You can't change the startup disk to the selected disk. The bless tool was unable to set the current boot disk."

What is a "bless tool" how can I get this to accept the partition change? I hope its not complicated, any suggestions?

How did you create the partitions?

 

[chabig]

How old is your Mac? The Bless Tool is something that existed before OS X and was particular to PPC Macs, as I recall. What model?

 

[Guzaking]

the 2 OSX's were SL and ML and the ML was involuntarily blessed and the SL never was on its own. So I had to erase the ML partition and keep it at nothing, then start up regularly so it recognizes the SL as the only bootable OSX left and then when it did so I made it the default startup drive which I wanted and then had to reinstall the ML back onto the now empty 2nd partition which was only a 20 gb test partition anyways. But that was the only way to do it, so that was my update.

This was on a 2010 Mac Mini the last one with the Superdrive which was the main reason why I bought it a few months ago for the Superdrive to rip DVD's into a media center. In my opinion 2010/2011 was Apple's peak years, and it's all been downhill after that :/