XCode si blocca ripetutamente al momento del lancio

Sono nuovo di OSX e utilizzo Mountain Lion in una Virtual Box VM. Xcode stava funzionando bene e sono riuscito a creare una semplice Hello World App. Ho riavviato la VM e quando ho provato a riaprire il mio progetto Xcode si è bloccato. Non ho pensato a nulla in quel momento, ma ogni volta che ho riavviato Xcode da allora, si è bloccato in questa fase:

LaCPUraggiungeil95%diutilizzoishedevoforzarel'uscitadaXcode.

QuantosegueèinXcode_Timestamp.hang:

Date/Time:2013-06-0712:02:37+0100OSVersion:10.8(Build12A269)Architecture:x86_64ReportVersion:11Command:XcodePath:/Applications/Xcode.app/Contents/MacOS/XcodeVersion:4.6.2(2067.2)BuildVersion:2ProjectName:IDEApplicationSourceVersion:2067002000000000AppItemID:497799835AppExternalID:15055625Parent:launchd[121]PID:353Event:hangDuration:0.88sSteps:9(100mssamplinginterval)Hardwaremodel:MacPro3,1Activecpus:1Freepages:433637pages(+16260)Pageins:1pagesPageouts:0pagesProcess:Xcode[353]Path:/Applications/Xcode.app/Contents/MacOS/XcodeArchitecture:x86_64Parent:launchd[121]UID:501Tasksize:175291pages(-18383)CPUTime:0.456s

Einsystem.log:

Jun712:16:07imorelaptop.hkc2k3.localDock[136]:noinformationbackfromLSaboutrunningprocessJun712:16:17imorelaptop.hkc2k3.localWindowServer[86]:CGXDisableUpdate:UIupdateswereforciblydisabledbyapplication"Xcode" for over 1.00 seconds. Server has re-enabled them.
Jun  7 12:16:31 imorelaptop.hkc2k3.local WindowServer[86]: disable_update_likely_unbalanced: UI updates still disabled by application "Xcode" after 15.00 seconds (server forcibly re-enabled them after 1.00 seconds). Likely an unbalanced disableUpdate call.
Jun  7 12:16:39 imorelaptop.hkc2k3.local WindowServer[86]: reenable_update_for_connection: UI updates were finally reenabled by application "Xcode" after 23.15 seconds (server forcibly re-enabled them after 1.00 seconds)
Jun  7 12:17:11 imorelaptop.hkc2k3.local sandboxd[461] ([38]): mds(38) deny mach-lookup �#�:�*��;�j�Z��=�����~�הz�Q�F���N�m�mR���>wD+֍�T#���)�'�ثw�T78۲��r���-�j�&��ň����P�6EAM-�0b
    ���Q��Xh�R��S�^��
Jun  7 12:17:11 imorelaptop kernel[0]: Sandbox: sandboxd(461) deny mach-lookup com.apple.coresymbolicationd
Jun  7 12:17:11 imorelaptop.hkc2k3.local sandboxd[461] ([38]): mds(38) deny mach-lookup �#�:�*��;�j�Z��=�����~�הz�Q�F���N�m�mR���>wD+֍�T#���)�'�ثw�T78۲��r���-�j�&��ň����P�6EAM-�0b
    ���Q��Xh�R��S�^��
Jun  7 12:19:51 imorelaptop.hkc2k3.local WebProcess[306]: CoreAnimation: unhandled combiner function: 11

Ho provato a riavviare la mia VM, aumentando la RAM a 4 GB (da 2 GB) e reinstallando Xcode, ma continuando a riscontrare lo stesso problema. Ho anche provato ad aprire app e file specifici in Xcode, ma l'applicazione si blocca ancora nello stesso punto.