Hi, It sounds like the USB media that you're using does not support the install media. Verify the state of the USB media by going into Disk Utility, then selecting the "Install MacOS Catalina" item from the selection table. Make sure to select the "Install MacOS Catalina" volume, not the parent disk. Once selected, press cmd-i to Get Info on the volume. Read through the various information items and make sure that it says that the device is bootable. Some specific items that are also important are if ownership is set to "No", File System is "MacOS Extended (Journaled", "Yes" to writeable and "Yes" it can be verified. If all that is good, but it is still not bootable, have you tried putting the stick into a different USB port on your Mac? Beyond these suggestions, I'd wait until your new USB comes from Amazon and see how things proceed with that media.
I just tested the process using Terminal and it worked properly. That is, the disk creation worked through it various copying, installing, making bootable processes and completed. I then checked in the Startup Disk pane and it was visible as a startup item. Basically, if you don't see it as a bootable item from within the Startup Disk pane, then using the option key method will not work either. FYI, my media was a 16 GB stick with a 2017 MacBook Pro with a brand new installer of 10.15.2 from Apple. HTH. Later... Tim Kilburn Jamf Certified Tech Apple Teacher (with Swift Playgrounds Recognition) Fort McMurray, AB Canada On Dec 20, 2019, at 08:21, Greg Wocher <[email protected]> wrote: Hello, I am using a 2015 MacBook air. The security utility is only used on Macs with the T2 chips in them. I am trying to create a bootable USB drive so I can preform a clean install of Catalina on my mac. I am wanting to start fresh with it. Greg Wocher > On Dec 20, 2019, at 9:59 AM, John Panarese <[email protected]> wrote: > > What are you attempting to create. In Mojave and Catalina, you have to boot > from the Recovery HD and use Security utility to make it so you can boot from > external drives. > > Take Care > > John D. Panarese > Director > Mac for the Blind > Tel, (631) 724-4479 > Email, [email protected] > Website, http://www.macfortheblind.com > > APPLE CERTIFIED SUPPORT PROFESSIONAL and Trainer > > AUTHORIZED APPLE STORE BUSINESS AFFILIATE > > MAC and iOS VOICEOVER TRAINING AND SUPPORT > > > > >> On Dec 20, 2019, at 6:43 AM, Greg Wocher <[email protected]> wrote: >> >> Hello, >> I did try using the terminal last night and still no go. The process seems >> to finish okay but the USB drive still does not show up in the startup disk >> section of system preferences. Even when I unlock it so I can make changes >> there is only one option and that is the hard disk. I am using the full Mac >> OS catalina installer. Its an 8GB file in my applications folder. I did go >> into recovery mode but I did not see anything that would enable me to boot >> from a USB drive. I think that might be a thing you can do with Macs that >> have the T2 chips only. >> >> Greg Wocher >> >> >>> On Dec 19, 2019, at 7:33 PM, 'E.T.' via MacVisionaries >>> <[email protected]> wrote: >>> >>> Easier? Maybe? I have used the app many times and it has never failed. >>> Matter of fact I retrieved the latest package from the app store when >>> 10.15.2 was released and I just created a new USB installer with it using >>> the app. And it shows up in startup. So I do not think the terminal would >>> fare any better. >>> >>> From E.T.'s Keyboard... >>> [email protected] >>> Many believe that we have been visited >>> in the past. What if it were true? >>> >>> On 12/19/2019 3:32 PM, Simon A Fogarty wrote: >>>> Hi greg, >>>> If the USb flash drive doesn't have a bootable package on it >>>> Then no you wont see it in start up disks as there is nothing on the USB >>>> device to start up from. >>>> If you have the bootable Catalina installer the full package then it would >>>> be easier by far to create the installation media from the terminal >>>> command line. >>>> -----Original Message----- >>>> From: [email protected] <[email protected]> On >>>> Behalf Of Greg Wocher >>>> Sent: Friday, 20 December 2019 8:01 AM >>>> To: [email protected] >>>> Subject: Re: Problems trying to create bootable USB Drive >>>> Hello, >>>> Well I downloaded install disk creator and it does have a much better >>>> interface than disk maker X. When I used it, it appeared to have worked. >>>> However when I go into system preferences/startup disk the flash drive is >>>> not listed. No matter what I do I cannot get this to work. I have a new >>>> flash drive on order from amazon that comes tomorrow. Both of the ones I >>>> have are older ones. They are USB 2.0 and 16GB. The new one is USB 3.1 and >>>> is 32GB. Anything else I can try while waiting on the new flash drive? >>>> Also if I do a restart and hold option down is there a way for me to tell >>>> if it did use the USB drive to boot? >>>> Thanks, >>>> Greg Wocher >>>>> On Dec 19, 2019, at 11:05 AM, 'E.T.' via MacVisionaries >>>>> <[email protected]> wrote: >>>>> >>>>> I would suggest this app, Install Disk Creator insteaa of DiskMaker X. I >>>>> had trouble with that one so threw it out. Also, you need at least a >>>>> 16gig stick. >>>>> >>>>> From E.T.'s Keyboard... >>>>> [email protected] >>>>> Many believe that we have been visited in the past. What if it were >>>>> true? >>>>> >>>>> On 12/19/2019 7:16 AM, Greg Wocher wrote: >>>>>> Hello all, >>>>>> I have been trying for the last several days to create a bootable USB >>>>>> drive so I can do a clean install on my mac. I am using a 2015 MacBook >>>>>> air that I bought in 2016. It is running the latest version of Catalina. >>>>>> I am using a program called Disk Maker X to create the USB drive. I have >>>>>> used two different flash drives I own. After completing the process, >>>>>> neither flash drives are recognized as start up disks. I am not sure >>>>>> what I am doing wrong. Anyone have any advice on what I can try so I can >>>>>> get a bootable USB drive? >>>>>> Thanks, >>>>>> Greg Wocher >>>>> >>>>> -- >>>>> The following information is important for all members of the Mac >>>>> Visionaries list. >>>>> >>>>> If you have any questions or concerns about the running of this list, or >>>>> if you feel that a member's post is inappropriate, please contact the >>>>> owners or moderators directly rather than posting on the list itself. >>>>> >>>>> Your Mac Visionaries list moderator is Mark Taylor. You can reach >>>>> mark at: [email protected] and your owner is Cara Quinn - you can reach >>>>> Cara at [email protected] >>>>> >>>>> The archives for this list can be searched at: >>>>> http://www.mail-archive.com/[email protected]/ >>>>> --- You received this message because you are subscribed to the Google >>>>> Groups "MacVisionaries" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send an >>>>> email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/macvisionaries/b951278a-6294-4e2b-0908-6ae85e47eb4f%40icloud.com. >>>> -- >>>> The following information is important for all members of the Mac >>>> Visionaries list. >>>> If you have any questions or concerns about the running of this list, or >>>> if you feel that a member's post is inappropriate, please contact the >>>> owners or moderators directly rather than posting on the list itself. >>>> Your Mac Visionaries list moderator is Mark Taylor. You can reach mark >>>> at: [email protected] and your owner is Cara Quinn - you can reach Cara at >>>> [email protected] >>>> The archives for this list can be searched at: >>>> http://www.mail-archive.com/[email protected]/ >>>> --- >>>> You received this message because you are subscribed to the Google Groups >>>> "MacVisionaries" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/macvisionaries/75A7A22C-97E9-4521-BD33-F78A857CB94C%40gwocher.com. >>> >>> -- >>> The following information is important for all members of the Mac >>> Visionaries list. >>> >>> If you have any questions or concerns about the running of this list, or if >>> you feel that a member's post is inappropriate, please contact the owners >>> or moderators directly rather than posting on the list itself. >>> >>> Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: >>> [email protected] and your owner is Cara Quinn - you can reach Cara at >>> [email protected] >>> >>> The archives for this list can be searched at: >>> http://www.mail-archive.com/[email protected]/ >>> --- You received this message because you are subscribed to the Google >>> Groups "MacVisionaries" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/macvisionaries/34c681f2-fcaa-142e-0a59-d2e4616bf5e8%40icloud.com. >> >> -- >> The following information is important for all members of the Mac >> Visionaries list. >> >> If you have any questions or concerns about the running of this list, or if >> you feel that a member's post is inappropriate, please contact the owners or >> moderators directly rather than posting on the list itself. >> >> Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: >> [email protected] and your owner is Cara Quinn - you can reach Cara at >> [email protected] >> >> The archives for this list can be searched at: >> http://www.mail-archive.com/[email protected]/ >> --- >> You received this message because you are subscribed to the Google Groups >> "MacVisionaries" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/macvisionaries/588D2754-2166-4107-873A-445712ED0575%40gwocher.com. > > -- > The following information is important for all members of the Mac Visionaries > list. > > If you have any questions or concerns about the running of this list, or if > you feel that a member's post is inappropriate, please contact the owners or > moderators directly rather than posting on the list itself. > > Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: > [email protected] and your owner is Cara Quinn - you can reach Cara at > [email protected] > > The archives for this list can be searched at: > http://www.mail-archive.com/[email protected]/ > --- > You received this message because you are subscribed to the Google Groups > "MacVisionaries" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/macvisionaries/BEE5E139-3F67-4C81-8869-4CC1762A90DB%40gmail.com. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: [email protected] and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/macvisionaries/C437E498-EB20-4A84-92DD-400AED34D3D6%40gwocher.com. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: [email protected] and your owner is Cara Quinn - you can reach Cara at [email protected] The archives for this list can be searched at: http://www.mail-archive.com/[email protected]/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/macvisionaries/FF5C8538-5A4D-4EEA-BE6F-A813A2A756A8%40me.com.
